20438750

素因数分解:

$2^1\times 5^4\times {\mathrm{83}}^1\times {\mathrm{197}}^1$

素因数の和:302

約数の個数: 40

約数和(自身を含む): 38968776

約数和(自身を除く): 18530026

約数列:

[1, 2, 5, 10, 25, 50, 83, 125, 166, 197, 250, 394, 415, 625, 830, 985, 1250, 1970, 2075, 4150, 4925, 9850, 10375, 16351, 20750, 24625, 32702, 49250, 51875, 81755, 103750, 123125, 163510, 246250, 408775, 817550, 2043875, 4087750, 10219375, 20438750]

約数ペア:

[(1, 20438750), (2, 10219375), (5, 4087750), (10, 2043875), (25, 817550), (50, 408775), (83, 246250), (125, 163510), (166, 123125), (197, 103750), (250, 81755), (394, 51875), (415, 49250), (625, 32702), (830, 24625), (985, 20750), (1250, 16351), (1970, 10375), (2075, 9850), (4150, 4925)]