21349360

素因数分解:

$2^4\times 5^1\times {\mathrm{266867}}^1$

素因数の和:266880

約数の個数: 20

約数和(自身を含む): 49637448

約数和(自身を除く): 28288088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266867, 533734, 1067468, 1334335, 2134936, 2668670, 4269872, 5337340, 10674680, 21349360]

約数ペア:

[(1, 21349360), (2, 10674680), (4, 5337340), (5, 4269872), (8, 2668670), (10, 2134936), (16, 1334335), (20, 1067468), (40, 533734), (80, 266867)]