20213750

素因数分解:

$2^1\times 5^4\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:282

約数の個数: 40

約数和(自身を含む): 38500176

約数和(自身を除く): 18286426

約数列:

[1, 2, 5, 10, 25, 50, 103, 125, 157, 206, 250, 314, 515, 625, 785, 1030, 1250, 1570, 2575, 3925, 5150, 7850, 12875, 16171, 19625, 25750, 32342, 39250, 64375, 80855, 98125, 128750, 161710, 196250, 404275, 808550, 2021375, 4042750, 10106875, 20213750]

約数ペア:

[(1, 20213750), (2, 10106875), (5, 4042750), (10, 2021375), (25, 808550), (50, 404275), (103, 196250), (125, 161710), (157, 128750), (206, 98125), (250, 80855), (314, 64375), (515, 39250), (625, 32342), (785, 25750), (1030, 19625), (1250, 16171), (1570, 12875), (2575, 7850), (3925, 5150)]