21525820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26251}}^1$

素因数の和:26301

約数の個数: 24

約数和(自身を含む): 46308528

約数和(自身を除く): 24782708

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26251, 52502, 105004, 131255, 262510, 525020, 1076291, 2152582, 4305164, 5381455, 10762910, 21525820]

約数ペア:

[(1, 21525820), (2, 10762910), (4, 5381455), (5, 4305164), (10, 2152582), (20, 1076291), (41, 525020), (82, 262510), (164, 131255), (205, 105004), (410, 52502), (820, 26251)]