20873840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20071}}^1$

素因数の和:20097

約数の個数: 40

約数和(自身を含む): 52267488

約数和(自身を除く): 31393648

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20071, 40142, 80284, 100355, 160568, 200710, 260923, 321136, 401420, 521846, 802840, 1043692, 1304615, 1605680, 2087384, 2609230, 4174768, 5218460, 10436920, 20873840]

約数ペア:

[(1, 20873840), (2, 10436920), (4, 5218460), (5, 4174768), (8, 2609230), (10, 2087384), (13, 1605680), (16, 1304615), (20, 1043692), (26, 802840), (40, 521846), (52, 401420), (65, 321136), (80, 260923), (104, 200710), (130, 160568), (208, 100355), (260, 80284), (520, 40142), (1040, 20071)]