20662720

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{4967}}^1$

素因数の和:4997

約数の個数: 56

約数和(自身を含む): 52998624

約数和(自身を除く): 32335904

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 4967, 9934, 19868, 24835, 39736, 49670, 64571, 79472, 99340, 129142, 158944, 198680, 258284, 317888, 322855, 397360, 516568, 645710, 794720, 1033136, 1291420, 1589440, 2066272, 2582840, 4132544, 5165680, 10331360, 20662720]

約数ペア:

[(1, 20662720), (2, 10331360), (4, 5165680), (5, 4132544), (8, 2582840), (10, 2066272), (13, 1589440), (16, 1291420), (20, 1033136), (26, 794720), (32, 645710), (40, 516568), (52, 397360), (64, 322855), (65, 317888), (80, 258284), (104, 198680), (130, 158944), (160, 129142), (208, 99340), (260, 79472), (320, 64571), (416, 49670), (520, 39736), (832, 24835), (1040, 19868), (2080, 9934), (4160, 4967)]