18711472

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{89959}}^1$

素因数の和:89980

約数の個数: 20

約数和(自身を含む): 39042640

約数和(自身を除く): 20331168

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 89959, 179918, 359836, 719672, 1169467, 1439344, 2338934, 4677868, 9355736, 18711472]

約数ペア:

[(1, 18711472), (2, 9355736), (4, 4677868), (8, 2338934), (13, 1439344), (16, 1169467), (26, 719672), (52, 359836), (104, 179918), (208, 89959)]