20781646220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25343471}}^1$

素因数の和:25343521

約数の個数: 24

約数和(自身を含む): 44705884608

約数和(自身を除く): 23924238388

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25343471, 50686942, 101373884, 126717355, 253434710, 506869420, 1039082311, 2078164622, 4156329244, 5195411555, 10390823110, 20781646220]

約数ペア:

[(1, 20781646220), (2, 10390823110), (4, 5195411555), (5, 4156329244), (10, 2078164622), (20, 1039082311), (41, 506869420), (82, 253434710), (164, 126717355), (205, 101373884), (410, 50686942), (820, 25343471)]