78487580

素因数分解:

$2^2\times 5^1\times {\mathrm{1801}}^1\times {\mathrm{2179}}^1$

素因数の和:3989

約数の個数: 24

約数和(自身を含む): 164991120

約数和(自身を除く): 86503540

約数列:

[1, 2, 4, 5, 10, 20, 1801, 2179, 3602, 4358, 7204, 8716, 9005, 10895, 18010, 21790, 36020, 43580, 3924379, 7848758, 15697516, 19621895, 39243790, 78487580]

約数ペア:

[(1, 78487580), (2, 39243790), (4, 19621895), (5, 15697516), (10, 7848758), (20, 3924379), (1801, 43580), (2179, 36020), (3602, 21790), (4358, 18010), (7204, 10895), (8716, 9005)]