18863780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{5581}}^1$

素因数の和:5616

約数の個数: 36

約数和(自身を含む): 42903252

約数和(自身を除く): 24039472

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 5581, 11162, 22324, 27905, 55810, 72553, 111620, 145106, 290212, 362765, 725530, 943189, 1451060, 1886378, 3772756, 4715945, 9431890, 18863780]

約数ペア:

[(1, 18863780), (2, 9431890), (4, 4715945), (5, 3772756), (10, 1886378), (13, 1451060), (20, 943189), (26, 725530), (52, 362765), (65, 290212), (130, 145106), (169, 111620), (260, 72553), (338, 55810), (676, 27905), (845, 22324), (1690, 11162), (3380, 5581)]