12398020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{8731}}^1$

素因数の和:8811

約数の個数: 24

約数和(自身を含む): 26405568

約数和(自身を除く): 14007548

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 8731, 17462, 34924, 43655, 87310, 174620, 619901, 1239802, 2479604, 3099505, 6199010, 12398020]

約数ペア:

[(1, 12398020), (2, 6199010), (4, 3099505), (5, 2479604), (10, 1239802), (20, 619901), (71, 174620), (142, 87310), (284, 43655), (355, 34924), (710, 17462), (1420, 8731)]