19968980

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{6701}}^1$

素因数の和:6859

約数の個数: 24

約数和(自身を含む): 42222600

約数和(自身を除く): 22253620

約数列:

[1, 2, 4, 5, 10, 20, 149, 298, 596, 745, 1490, 2980, 6701, 13402, 26804, 33505, 67010, 134020, 998449, 1996898, 3993796, 4992245, 9984490, 19968980]

約数ペア:

[(1, 19968980), (2, 9984490), (4, 4992245), (5, 3993796), (10, 1996898), (20, 998449), (149, 134020), (298, 67010), (596, 33505), (745, 26804), (1490, 13402), (2980, 6701)]