218920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1$

素因数の和:445

約数の個数: 32

約数和(自身を含む): 531720

約数和(自身を除く): 312800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 421, 520, 842, 1684, 2105, 3368, 4210, 5473, 8420, 10946, 16840, 21892, 27365, 43784, 54730, 109460, 218920]

約数ペア:

[(1, 218920), (2, 109460), (4, 54730), (5, 43784), (8, 27365), (10, 21892), (13, 16840), (20, 10946), (26, 8420), (40, 5473), (52, 4210), (65, 3368), (104, 2105), (130, 1684), (260, 842), (421, 520)]