18680272

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{89809}}^1$

素因数の和:89830

約数の個数: 20

約数和(自身を含む): 38977540

約数和(自身を除く): 20297268

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 89809, 179618, 359236, 718472, 1167517, 1436944, 2335034, 4670068, 9340136, 18680272]

約数ペア:

[(1, 18680272), (2, 9340136), (4, 4670068), (8, 2335034), (13, 1436944), (16, 1167517), (26, 718472), (52, 359236), (104, 179618), (208, 89809)]