64509820

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{40829}}^1$

素因数の和:40917

約数の個数: 24

約数和(自身を含む): 137188800

約数和(自身を除く): 72678980

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 40829, 81658, 163316, 204145, 408290, 816580, 3225491, 6450982, 12901964, 16127455, 32254910, 64509820]

約数ペア:

[(1, 64509820), (2, 32254910), (4, 16127455), (5, 12901964), (10, 6450982), (20, 3225491), (79, 816580), (158, 408290), (316, 204145), (395, 163316), (790, 81658), (1580, 40829)]