20515240

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{9677}}^1$

素因数の和:9741

約数の個数: 32

約数和(自身を含む): 47035080

約数和(自身を除く): 26519840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 9677, 19354, 38708, 48385, 77416, 96770, 193540, 387080, 512881, 1025762, 2051524, 2564405, 4103048, 5128810, 10257620, 20515240]

約数ペア:

[(1, 20515240), (2, 10257620), (4, 5128810), (5, 4103048), (8, 2564405), (10, 2051524), (20, 1025762), (40, 512881), (53, 387080), (106, 193540), (212, 96770), (265, 77416), (424, 48385), (530, 38708), (1060, 19354), (2120, 9677)]