21857540

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6961}}^1$

素因数の和:7127

約数の個数: 24

約数和(自身を含む): 46199832

約数和(自身を除く): 24342292

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6961, 13922, 27844, 34805, 69610, 139220, 1092877, 2185754, 4371508, 5464385, 10928770, 21857540]

約数ペア:

[(1, 21857540), (2, 10928770), (4, 5464385), (5, 4371508), (10, 2185754), (20, 1092877), (157, 139220), (314, 69610), (628, 34805), (785, 27844), (1570, 13922), (3140, 6961)]