21570605

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{199}}^1$

素因数の和:393

約数の個数: 32

約数和(自身を含む): 31488000

約数和(自身を除く): 9917395

約数列:

[1, 5, 7, 19, 35, 95, 133, 163, 199, 665, 815, 995, 1141, 1393, 3097, 3781, 5705, 6965, 15485, 18905, 21679, 26467, 32437, 108395, 132335, 162185, 227059, 616303, 1135295, 3081515, 4314121, 21570605]

約数ペア:

[(1, 21570605), (5, 4314121), (7, 3081515), (19, 1135295), (35, 616303), (95, 227059), (133, 162185), (163, 132335), (199, 108395), (665, 32437), (815, 26467), (995, 21679), (1141, 18905), (1393, 15485), (3097, 6965), (3781, 5705)]