20815750

素因数分解:

$2^1\times 5^3\times {\mathrm{53}}^1\times {\mathrm{1571}}^1$

素因数の和:1641

約数の個数: 32

約数和(自身を含む): 39727584

約数和(自身を除く): 18911834

約数列:

[1, 2, 5, 10, 25, 50, 53, 106, 125, 250, 265, 530, 1325, 1571, 2650, 3142, 6625, 7855, 13250, 15710, 39275, 78550, 83263, 166526, 196375, 392750, 416315, 832630, 2081575, 4163150, 10407875, 20815750]

約数ペア:

[(1, 20815750), (2, 10407875), (5, 4163150), (10, 2081575), (25, 832630), (50, 416315), (53, 392750), (106, 196375), (125, 166526), (250, 83263), (265, 78550), (530, 39275), (1325, 15710), (1571, 13250), (2650, 7855), (3142, 6625)]