20279740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{77999}}^1$

素因数の和:78021

約数の個数: 24

約数和(自身を含む): 45864000

約数和(自身を除く): 25584260

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 77999, 155998, 311996, 389995, 779990, 1013987, 1559980, 2027974, 4055948, 5069935, 10139870, 20279740]

約数ペア:

[(1, 20279740), (2, 10139870), (4, 5069935), (5, 4055948), (10, 2027974), (13, 1559980), (20, 1013987), (26, 779990), (52, 389995), (65, 311996), (130, 155998), (260, 77999)]