18278980

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{9049}}^1$

素因数の和:9159

約数の個数: 24

約数和(自身を含む): 38770200

約数和(自身を除く): 20491220

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 9049, 18098, 36196, 45245, 90490, 180980, 913949, 1827898, 3655796, 4569745, 9139490, 18278980]

約数ペア:

[(1, 18278980), (2, 9139490), (4, 4569745), (5, 3655796), (10, 1827898), (20, 913949), (101, 180980), (202, 90490), (404, 45245), (505, 36196), (1010, 18098), (2020, 9049)]