20989280

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10091}}^1$

素因数の和:10119

約数の個数: 48

約数和(自身を含む): 53406864

約数和(自身を除く): 32417584

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10091, 20182, 40364, 50455, 80728, 100910, 131183, 161456, 201820, 262366, 322912, 403640, 524732, 655915, 807280, 1049464, 1311830, 1614560, 2098928, 2623660, 4197856, 5247320, 10494640, 20989280]

約数ペア:

[(1, 20989280), (2, 10494640), (4, 5247320), (5, 4197856), (8, 2623660), (10, 2098928), (13, 1614560), (16, 1311830), (20, 1049464), (26, 807280), (32, 655915), (40, 524732), (52, 403640), (65, 322912), (80, 262366), (104, 201820), (130, 161456), (160, 131183), (208, 100910), (260, 80728), (416, 50455), (520, 40364), (1040, 20182), (2080, 10091)]