20968515

素因数分解:

$3^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3557}}^1$

素因数の和:3699

約数の個数: 24

約数和(自身を含む): 36633168

約数和(自身を除く): 15664653

約数列:

[1, 3, 5, 9, 15, 45, 131, 393, 655, 1179, 1965, 3557, 5895, 10671, 17785, 32013, 53355, 160065, 465967, 1397901, 2329835, 4193703, 6989505, 20968515]

約数ペア:

[(1, 20968515), (3, 6989505), (5, 4193703), (9, 2329835), (15, 1397901), (45, 465967), (131, 160065), (393, 53355), (655, 32013), (1179, 17785), (1965, 10671), (3557, 5895)]