21937240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{42187}}^1$

素因数の和:42211

約数の個数: 32

約数和(自身を含む): 53156880

約数和(自身を除く): 31219640

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 42187, 84374, 168748, 210935, 337496, 421870, 548431, 843740, 1096862, 1687480, 2193724, 2742155, 4387448, 5484310, 10968620, 21937240]

約数ペア:

[(1, 21937240), (2, 10968620), (4, 5484310), (5, 4387448), (8, 2742155), (10, 2193724), (13, 1687480), (20, 1096862), (26, 843740), (40, 548431), (52, 421870), (65, 337496), (104, 210935), (130, 168748), (260, 84374), (520, 42187)]