257257840

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1$

素因数の和:160

約数の個数: 240

約数和(自身を含む): 753166080

約数和(自身を除く): 495908240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 31, 35, 40, 49, 56, 58, 62, 70, 73, 80, 98, 112, 116, 124, 140, 145, 146, 155, 196, 203, 217, 232, 245, 248, 280, 290, 292, 310, 365, 392, 406, 434, 464, 490, 496, 511, 560, 580, 584, 620, 730, 784, 812, 868, 899, 980, 1015, 1022, 1085, 1160, 1168, 1240, 1421, 1460, 1519, 1624, 1736, 1798, 1960, 2030, 2044, 2117, 2170, 2263, 2320, 2480, 2555, 2842, 2920, 3038, 3248, 3472, 3577, 3596, 3920, 4060, 4088, 4234, 4340, 4495, 4526, 5110, 5684, 5840, 6076, 6293, 7105, 7154, 7192, 7595, 8120, 8176, 8468, 8680, 8990, 9052, 10220, 10585, 11315, 11368, 12152, 12586, 14210, 14308, 14384, 14819, 15190, 15841, 16240, 16936, 17360, 17885, 17980, 18104, 20440, 21170, 22630, 22736, 24304, 25172, 28420, 28616, 29638, 30380, 31465, 31682, 33872, 35770, 35960, 36208, 40880, 42340, 44051, 45260, 50344, 56840, 57232, 59276, 60760, 62930, 63364, 65627, 71540, 71920, 74095, 79205, 84680, 88102, 90520, 100688, 103733, 110887, 113680, 118552, 121520, 125860, 126728, 131254, 143080, 148190, 158410, 169360, 176204, 181040, 207466, 220255, 221774, 237104, 251720, 253456, 262508, 286160, 296380, 316820, 328135, 352408, 414932, 440510, 443548, 459389, 503440, 518665, 525016, 554435, 592760, 633640, 656270, 704816, 829864, 881020, 887096, 918778, 1037330, 1050032, 1108870, 1185520, 1267280, 1312540, 1659728, 1762040, 1774192, 1837556, 2074660, 2217740, 2296945, 2625080, 3215723, 3524080, 3675112, 4149320, 4435480, 4593890, 5250160, 6431446, 7350224, 8298640, 8870960, 9187780, 12862892, 16078615, 18375560, 25725784, 32157230, 36751120, 51451568, 64314460, 128628920, 257257840]

約数ペア:

[(1, 257257840), (2, 128628920), (4, 64314460), (5, 51451568), (7, 36751120), (8, 32157230), (10, 25725784), (14, 18375560), (16, 16078615), (20, 12862892), (28, 9187780), (29, 8870960), (31, 8298640), (35, 7350224), (40, 6431446), (49, 5250160), (56, 4593890), (58, 4435480), (62, 4149320), (70, 3675112), (73, 3524080), (80, 3215723), (98, 2625080), (112, 2296945), (116, 2217740), (124, 2074660), (140, 1837556), (145, 1774192), (146, 1762040), (155, 1659728), (196, 1312540), (203, 1267280), (217, 1185520), (232, 1108870), (245, 1050032), (248, 1037330), (280, 918778), (290, 887096), (292, 881020), (310, 829864), (365, 704816), (392, 656270), (406, 633640), (434, 592760), (464, 554435), (490, 525016), (496, 518665), (511, 503440), (560, 459389), (580, 443548), (584, 440510), (620, 414932), (730, 352408), (784, 328135), (812, 316820), (868, 296380), (899, 286160), (980, 262508), (1015, 253456), (1022, 251720), (1085, 237104), (1160, 221774), (1168, 220255), (1240, 207466), (1421, 181040), (1460, 176204), (1519, 169360), (1624, 158410), (1736, 148190), (1798, 143080), (1960, 131254), (2030, 126728), (2044, 125860), (2117, 121520), (2170, 118552), (2263, 113680), (2320, 110887), (2480, 103733), (2555, 100688), (2842, 90520), (2920, 88102), (3038, 84680), (3248, 79205), (3472, 74095), (3577, 71920), (3596, 71540), (3920, 65627), (4060, 63364), (4088, 62930), (4234, 60760), (4340, 59276), (4495, 57232), (4526, 56840), (5110, 50344), (5684, 45260), (5840, 44051), (6076, 42340), (6293, 40880), (7105, 36208), (7154, 35960), (7192, 35770), (7595, 33872), (8120, 31682), (8176, 31465), (8468, 30380), (8680, 29638), (8990, 28616), (9052, 28420), (10220, 25172), (10585, 24304), (11315, 22736), (11368, 22630), (12152, 21170), (12586, 20440), (14210, 18104), (14308, 17980), (14384, 17885), (14819, 17360), (15190, 16936), (15841, 16240)]