20905070

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{122971}}^1$

素因数の和:122995

約数の個数: 16

約数和(自身を含む): 39842928

約数和(自身を除く): 18937858

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 122971, 245942, 614855, 1229710, 2090507, 4181014, 10452535, 20905070]

約数ペア:

[(1, 20905070), (2, 10452535), (5, 4181014), (10, 2090507), (17, 1229710), (34, 614855), (85, 245942), (170, 122971)]