21477920

素因数分解:

$2^5\times 5^1\times {\mathrm{241}}^1\times {\mathrm{557}}^1$

素因数の和:813

約数の個数: 48

約数和(自身を含む): 51043608

約数和(自身を除く): 29565688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 241, 482, 557, 964, 1114, 1205, 1928, 2228, 2410, 2785, 3856, 4456, 4820, 5570, 7712, 8912, 9640, 11140, 17824, 19280, 22280, 38560, 44560, 89120, 134237, 268474, 536948, 671185, 1073896, 1342370, 2147792, 2684740, 4295584, 5369480, 10738960, 21477920]

約数ペア:

[(1, 21477920), (2, 10738960), (4, 5369480), (5, 4295584), (8, 2684740), (10, 2147792), (16, 1342370), (20, 1073896), (32, 671185), (40, 536948), (80, 268474), (160, 134237), (241, 89120), (482, 44560), (557, 38560), (964, 22280), (1114, 19280), (1205, 17824), (1928, 11140), (2228, 9640), (2410, 8912), (2785, 7712), (3856, 5570), (4456, 4820)]