21386265

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{467}}^1$

素因数の和:589

約数の個数: 32

約数和(自身を含む): 35582976

約数和(自身を除く): 14196711

約数列:

[1, 3, 5, 15, 43, 71, 129, 213, 215, 355, 467, 645, 1065, 1401, 2335, 3053, 7005, 9159, 15265, 20081, 33157, 45795, 60243, 99471, 100405, 165785, 301215, 497355, 1425751, 4277253, 7128755, 21386265]

約数ペア:

[(1, 21386265), (3, 7128755), (5, 4277253), (15, 1425751), (43, 497355), (71, 301215), (129, 165785), (213, 100405), (215, 99471), (355, 60243), (467, 45795), (645, 33157), (1065, 20081), (1401, 15265), (2335, 9159), (3053, 7005)]