21371870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{2081}}^1$

素因数の和:2180

約数の個数: 32

約数和(自身を含む): 41973120

約数和(自身を除く): 20601250

約数列:

[1, 2, 5, 10, 13, 26, 65, 79, 130, 158, 395, 790, 1027, 2054, 2081, 4162, 5135, 10270, 10405, 20810, 27053, 54106, 135265, 164399, 270530, 328798, 821995, 1643990, 2137187, 4274374, 10685935, 21371870]

約数ペア:

[(1, 21371870), (2, 10685935), (5, 4274374), (10, 2137187), (13, 1643990), (26, 821995), (65, 328798), (79, 270530), (130, 164399), (158, 135265), (395, 54106), (790, 27053), (1027, 20810), (2054, 10405), (2081, 10270), (4162, 5135)]