21354320

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20533}}^1$

素因数の和:20559

約数の個数: 40

約数和(自身を含む): 53470536

約数和(自身を除く): 32116216

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20533, 41066, 82132, 102665, 164264, 205330, 266929, 328528, 410660, 533858, 821320, 1067716, 1334645, 1642640, 2135432, 2669290, 4270864, 5338580, 10677160, 21354320]

約数ペア:

[(1, 21354320), (2, 10677160), (4, 5338580), (5, 4270864), (8, 2669290), (10, 2135432), (13, 1642640), (16, 1334645), (20, 1067716), (26, 821320), (40, 533858), (52, 410660), (65, 328528), (80, 266929), (104, 205330), (130, 164264), (208, 102665), (260, 82132), (520, 41066), (1040, 20533)]