20678750

素因数分解:

$2^1\times 5^4\times {\mathrm{71}}^1\times {\mathrm{233}}^1$

素因数の和:326

約数の個数: 40

約数和(自身を含む): 39474864

約数和(自身を除く): 18796114

約数列:

[1, 2, 5, 10, 25, 50, 71, 125, 142, 233, 250, 355, 466, 625, 710, 1165, 1250, 1775, 2330, 3550, 5825, 8875, 11650, 16543, 17750, 29125, 33086, 44375, 58250, 82715, 88750, 145625, 165430, 291250, 413575, 827150, 2067875, 4135750, 10339375, 20678750]

約数ペア:

[(1, 20678750), (2, 10339375), (5, 4135750), (10, 2067875), (25, 827150), (50, 413575), (71, 291250), (125, 165430), (142, 145625), (233, 88750), (250, 82715), (355, 58250), (466, 44375), (625, 33086), (710, 29125), (1165, 17750), (1250, 16543), (1775, 11650), (2330, 8875), (3550, 5825)]