18211780

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{6551}}^1$

素因数の和:6699

約数の個数: 24

約数和(自身を含む): 38525760

約数和(自身を除く): 20313980

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 6551, 13102, 26204, 32755, 65510, 131020, 910589, 1821178, 3642356, 4552945, 9105890, 18211780]

約数ペア:

[(1, 18211780), (2, 9105890), (4, 4552945), (5, 3642356), (10, 1821178), (20, 910589), (139, 131020), (278, 65510), (556, 32755), (695, 26204), (1390, 13102), (2780, 6551)]