21087640

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{29}}^1\times {\mathrm{53}}^1$

素因数の和:114

約数の個数: 128

約数和(自身を含む): 58320000

約数和(自身を除く): 37232360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 40, 49, 53, 56, 58, 70, 98, 106, 116, 140, 145, 196, 203, 212, 232, 245, 265, 280, 290, 343, 371, 392, 406, 424, 490, 530, 580, 686, 742, 812, 980, 1015, 1060, 1160, 1372, 1421, 1484, 1537, 1624, 1715, 1855, 1960, 2030, 2120, 2597, 2744, 2842, 2968, 3074, 3430, 3710, 4060, 5194, 5684, 6148, 6860, 7105, 7420, 7685, 8120, 9947, 10388, 10759, 11368, 12296, 12985, 13720, 14210, 14840, 15370, 18179, 19894, 20776, 21518, 25970, 28420, 30740, 36358, 39788, 43036, 49735, 51940, 53795, 56840, 61480, 72716, 75313, 79576, 86072, 90895, 99470, 103880, 107590, 145432, 150626, 181790, 198940, 215180, 301252, 363580, 376565, 397880, 430360, 527191, 602504, 727160, 753130, 1054382, 1506260, 2108764, 2635955, 3012520, 4217528, 5271910, 10543820, 21087640]

約数ペア:

[(1, 21087640), (2, 10543820), (4, 5271910), (5, 4217528), (7, 3012520), (8, 2635955), (10, 2108764), (14, 1506260), (20, 1054382), (28, 753130), (29, 727160), (35, 602504), (40, 527191), (49, 430360), (53, 397880), (56, 376565), (58, 363580), (70, 301252), (98, 215180), (106, 198940), (116, 181790), (140, 150626), (145, 145432), (196, 107590), (203, 103880), (212, 99470), (232, 90895), (245, 86072), (265, 79576), (280, 75313), (290, 72716), (343, 61480), (371, 56840), (392, 53795), (406, 51940), (424, 49735), (490, 43036), (530, 39788), (580, 36358), (686, 30740), (742, 28420), (812, 25970), (980, 21518), (1015, 20776), (1060, 19894), (1160, 18179), (1372, 15370), (1421, 14840), (1484, 14210), (1537, 13720), (1624, 12985), (1715, 12296), (1855, 11368), (1960, 10759), (2030, 10388), (2120, 9947), (2597, 8120), (2744, 7685), (2842, 7420), (2968, 7105), (3074, 6860), (3430, 6148), (3710, 5684), (4060, 5194)]