20198960

素因数分解:

$2^4\times 5^1\times {\mathrm{163}}^1\times {\mathrm{1549}}^1$

素因数の和:1725

約数の個数: 40

約数和(自身を含む): 47281200

約数和(自身を除く): 27082240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 163, 326, 652, 815, 1304, 1549, 1630, 2608, 3098, 3260, 6196, 6520, 7745, 12392, 13040, 15490, 24784, 30980, 61960, 123920, 252487, 504974, 1009948, 1262435, 2019896, 2524870, 4039792, 5049740, 10099480, 20198960]

約数ペア:

[(1, 20198960), (2, 10099480), (4, 5049740), (5, 4039792), (8, 2524870), (10, 2019896), (16, 1262435), (20, 1009948), (40, 504974), (80, 252487), (163, 123920), (326, 61960), (652, 30980), (815, 24784), (1304, 15490), (1549, 13040), (1630, 12392), (2608, 7745), (3098, 6520), (3260, 6196)]