20977580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80683}}^1$

素因数の和:80705

約数の個数: 24

約数和(自身を含む): 47442192

約数和(自身を除く): 26464612

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80683, 161366, 322732, 403415, 806830, 1048879, 1613660, 2097758, 4195516, 5244395, 10488790, 20977580]

約数ペア:

[(1, 20977580), (2, 10488790), (4, 5244395), (5, 4195516), (10, 2097758), (13, 1613660), (20, 1048879), (26, 806830), (52, 403415), (65, 322732), (130, 161366), (260, 80683)]