21285850

素因数分解:

$2^1\times 5^2\times {\mathrm{197}}^1\times {\mathrm{2161}}^1$

素因数の和:2370

約数の個数: 24

約数和(自身を含む): 39811068

約数和(自身を除く): 18525218

約数列:

[1, 2, 5, 10, 25, 50, 197, 394, 985, 1970, 2161, 4322, 4925, 9850, 10805, 21610, 54025, 108050, 425717, 851434, 2128585, 4257170, 10642925, 21285850]

約数ペア:

[(1, 21285850), (2, 10642925), (5, 4257170), (10, 2128585), (25, 851434), (50, 425717), (197, 108050), (394, 54025), (985, 21610), (1970, 10805), (2161, 9850), (4322, 4925)]