20901724

素因数分解:

$2^2\times {\mathrm{83}}^1\times {\mathrm{157}}^1\times {\mathrm{401}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 37347408

約数和(自身を除く): 16445684

約数列:

[1, 2, 4, 83, 157, 166, 314, 332, 401, 628, 802, 1604, 13031, 26062, 33283, 52124, 62957, 66566, 125914, 133132, 251828, 5225431, 10450862, 20901724]

約数ペア:

[(1, 20901724), (2, 10450862), (4, 5225431), (83, 251828), (157, 133132), (166, 125914), (314, 66566), (332, 62957), (401, 52124), (628, 33283), (802, 26062), (1604, 13031)]