20917120

素因数分解:

$2^7\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1$

素因数の和:85

約数の個数: 192

約数和(自身を含む): 62791200

約数和(自身を除く): 41874080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 29, 32, 35, 40, 46, 49, 56, 58, 64, 70, 80, 92, 98, 112, 115, 116, 128, 140, 145, 160, 161, 184, 196, 203, 224, 230, 232, 245, 280, 290, 320, 322, 368, 392, 406, 448, 460, 464, 490, 560, 580, 640, 644, 667, 736, 784, 805, 812, 896, 920, 928, 980, 1015, 1120, 1127, 1160, 1288, 1334, 1421, 1472, 1568, 1610, 1624, 1840, 1856, 1960, 2030, 2240, 2254, 2320, 2576, 2668, 2842, 2944, 3136, 3220, 3248, 3335, 3680, 3712, 3920, 4060, 4480, 4508, 4640, 4669, 5152, 5336, 5635, 5684, 6272, 6440, 6496, 6670, 7105, 7360, 7840, 8120, 9016, 9280, 9338, 10304, 10672, 11270, 11368, 12880, 12992, 13340, 14210, 14720, 15680, 16240, 18032, 18560, 18676, 20608, 21344, 22540, 22736, 23345, 25760, 25984, 26680, 28420, 31360, 32480, 32683, 36064, 37352, 42688, 45080, 45472, 46690, 51520, 53360, 56840, 64960, 65366, 72128, 74704, 85376, 90160, 90944, 93380, 103040, 106720, 113680, 129920, 130732, 144256, 149408, 163415, 180320, 181888, 186760, 213440, 227360, 261464, 298816, 326830, 360640, 373520, 426880, 454720, 522928, 597632, 653660, 721280, 747040, 909440, 1045856, 1307320, 1494080, 2091712, 2614640, 2988160, 4183424, 5229280, 10458560, 20917120]

約数ペア:

[(1, 20917120), (2, 10458560), (4, 5229280), (5, 4183424), (7, 2988160), (8, 2614640), (10, 2091712), (14, 1494080), (16, 1307320), (20, 1045856), (23, 909440), (28, 747040), (29, 721280), (32, 653660), (35, 597632), (40, 522928), (46, 454720), (49, 426880), (56, 373520), (58, 360640), (64, 326830), (70, 298816), (80, 261464), (92, 227360), (98, 213440), (112, 186760), (115, 181888), (116, 180320), (128, 163415), (140, 149408), (145, 144256), (160, 130732), (161, 129920), (184, 113680), (196, 106720), (203, 103040), (224, 93380), (230, 90944), (232, 90160), (245, 85376), (280, 74704), (290, 72128), (320, 65366), (322, 64960), (368, 56840), (392, 53360), (406, 51520), (448, 46690), (460, 45472), (464, 45080), (490, 42688), (560, 37352), (580, 36064), (640, 32683), (644, 32480), (667, 31360), (736, 28420), (784, 26680), (805, 25984), (812, 25760), (896, 23345), (920, 22736), (928, 22540), (980, 21344), (1015, 20608), (1120, 18676), (1127, 18560), (1160, 18032), (1288, 16240), (1334, 15680), (1421, 14720), (1472, 14210), (1568, 13340), (1610, 12992), (1624, 12880), (1840, 11368), (1856, 11270), (1960, 10672), (2030, 10304), (2240, 9338), (2254, 9280), (2320, 9016), (2576, 8120), (2668, 7840), (2842, 7360), (2944, 7105), (3136, 6670), (3220, 6496), (3248, 6440), (3335, 6272), (3680, 5684), (3712, 5635), (3920, 5336), (4060, 5152), (4480, 4669), (4508, 4640)]