20990280

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{211}}^1\times {\mathrm{829}}^1$

素因数の和:1054

約数の個数: 64

約数和(自身を含む): 63345600

約数和(自身を除く): 42355320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 211, 422, 633, 829, 844, 1055, 1266, 1658, 1688, 2110, 2487, 2532, 3165, 3316, 4145, 4220, 4974, 5064, 6330, 6632, 8290, 8440, 9948, 12435, 12660, 16580, 19896, 24870, 25320, 33160, 49740, 99480, 174919, 349838, 524757, 699676, 874595, 1049514, 1399352, 1749190, 2099028, 2623785, 3498380, 4198056, 5247570, 6996760, 10495140, 20990280]

約数ペア:

[(1, 20990280), (2, 10495140), (3, 6996760), (4, 5247570), (5, 4198056), (6, 3498380), (8, 2623785), (10, 2099028), (12, 1749190), (15, 1399352), (20, 1049514), (24, 874595), (30, 699676), (40, 524757), (60, 349838), (120, 174919), (211, 99480), (422, 49740), (633, 33160), (829, 25320), (844, 24870), (1055, 19896), (1266, 16580), (1658, 12660), (1688, 12435), (2110, 9948), (2487, 8440), (2532, 8290), (3165, 6632), (3316, 6330), (4145, 5064), (4220, 4974)]