21726640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{1607}}^1$

素因数の和:1646

約数の個数: 60

約数和(自身を含む): 54733104

約数和(自身を除く): 33006464

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 169, 208, 260, 338, 520, 676, 845, 1040, 1352, 1607, 1690, 2704, 3214, 3380, 6428, 6760, 8035, 12856, 13520, 16070, 20891, 25712, 32140, 41782, 64280, 83564, 104455, 128560, 167128, 208910, 271583, 334256, 417820, 543166, 835640, 1086332, 1357915, 1671280, 2172664, 2715830, 4345328, 5431660, 10863320, 21726640]

約数ペア:

[(1, 21726640), (2, 10863320), (4, 5431660), (5, 4345328), (8, 2715830), (10, 2172664), (13, 1671280), (16, 1357915), (20, 1086332), (26, 835640), (40, 543166), (52, 417820), (65, 334256), (80, 271583), (104, 208910), (130, 167128), (169, 128560), (208, 104455), (260, 83564), (338, 64280), (520, 41782), (676, 32140), (845, 25712), (1040, 20891), (1352, 16070), (1607, 13520), (1690, 12856), (2704, 8035), (3214, 6760), (3380, 6428)]