18811390

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{11131}}^1$

素因数の和:11164

約数の個数: 24

約数和(自身を含む): 36668808

約数和(自身を除く): 17857418

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 11131, 22262, 55655, 111310, 144703, 289406, 723515, 1447030, 1881139, 3762278, 9405695, 18811390]

約数ペア:

[(1, 18811390), (2, 9405695), (5, 3762278), (10, 1881139), (13, 1447030), (26, 723515), (65, 289406), (130, 144703), (169, 111310), (338, 55655), (845, 22262), (1690, 11131)]