20615205

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1489}}^1$

素因数の和:1581

約数の個数: 32

約数和(自身を含む): 36046080

約数和(自身を除く): 15430875

約数列:

[1, 3, 5, 13, 15, 39, 65, 71, 195, 213, 355, 923, 1065, 1489, 2769, 4467, 4615, 7445, 13845, 19357, 22335, 58071, 96785, 105719, 290355, 317157, 528595, 1374347, 1585785, 4123041, 6871735, 20615205]

約数ペア:

[(1, 20615205), (3, 6871735), (5, 4123041), (13, 1585785), (15, 1374347), (39, 528595), (65, 317157), (71, 290355), (195, 105719), (213, 96785), (355, 58071), (923, 22335), (1065, 19357), (1489, 13845), (2769, 7445), (4467, 4615)]