81087890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{47981}}^1$

素因数の和:48014

約数の個数: 24

約数和(自身を含む): 158052708

約数和(自身を除く): 76964818

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 47981, 95962, 239905, 479810, 623753, 1247506, 3118765, 6237530, 8108789, 16217578, 40543945, 81087890]

約数ペア:

[(1, 81087890), (2, 40543945), (5, 16217578), (10, 8108789), (13, 6237530), (26, 3118765), (65, 1247506), (130, 623753), (169, 479810), (338, 239905), (845, 95962), (1690, 47981)]