21042320

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20233}}^1$

素因数の和:20259

約数の個数: 40

約数和(自身を含む): 52689336

約数和(自身を除く): 31647016

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20233, 40466, 80932, 101165, 161864, 202330, 263029, 323728, 404660, 526058, 809320, 1052116, 1315145, 1618640, 2104232, 2630290, 4208464, 5260580, 10521160, 21042320]

約数ペア:

[(1, 21042320), (2, 10521160), (4, 5260580), (5, 4208464), (8, 2630290), (10, 2104232), (13, 1618640), (16, 1315145), (20, 1052116), (26, 809320), (40, 526058), (52, 404660), (65, 323728), (80, 263029), (104, 202330), (130, 161864), (208, 101165), (260, 80932), (520, 40466), (1040, 20233)]