18980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1$

素因数の和:95

約数の個数: 24

約数和(自身を含む): 43512

約数和(自身を除く): 24532

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 73, 130, 146, 260, 292, 365, 730, 949, 1460, 1898, 3796, 4745, 9490, 18980]

約数ペア:

[(1, 18980), (2, 9490), (4, 4745), (5, 3796), (10, 1898), (13, 1460), (20, 949), (26, 730), (52, 365), (65, 292), (73, 260), (130, 146)]