18128380

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{6521}}^1$

素因数の和:6669

約数の個数: 24

約数和(自身を含む): 38349360

約数和(自身を除く): 20220980

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 6521, 13042, 26084, 32605, 65210, 130420, 906419, 1812838, 3625676, 4532095, 9064190, 18128380]

約数ペア:

[(1, 18128380), (2, 9064190), (4, 4532095), (5, 3625676), (10, 1812838), (20, 906419), (139, 130420), (278, 65210), (556, 32605), (695, 26084), (1390, 13042), (2780, 6521)]