21697400

素因数分解:

$2^3\times 5^2\times {\mathrm{157}}^1\times {\mathrm{691}}^1$

素因数の和:864

約数の個数: 48

約数和(自身を含む): 50841240

約数和(自身を除く): 29143840

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 157, 200, 314, 628, 691, 785, 1256, 1382, 1570, 2764, 3140, 3455, 3925, 5528, 6280, 6910, 7850, 13820, 15700, 17275, 27640, 31400, 34550, 69100, 108487, 138200, 216974, 433948, 542435, 867896, 1084870, 2169740, 2712175, 4339480, 5424350, 10848700, 21697400]

約数ペア:

[(1, 21697400), (2, 10848700), (4, 5424350), (5, 4339480), (8, 2712175), (10, 2169740), (20, 1084870), (25, 867896), (40, 542435), (50, 433948), (100, 216974), (157, 138200), (200, 108487), (314, 69100), (628, 34550), (691, 31400), (785, 27640), (1256, 17275), (1382, 15700), (1570, 13820), (2764, 7850), (3140, 6910), (3455, 6280), (3925, 5528)]