638962569

素因数分解:

$3^2\times 7^1\times {\mathrm{223}}^1\times {\mathrm{45481}}^1$

素因数の和:45717

約数の個数: 24

約数和(自身を含む): 1059548672

約数和(自身を除く): 420586103

約数列:

[1, 3, 7, 9, 21, 63, 223, 669, 1561, 2007, 4683, 14049, 45481, 136443, 318367, 409329, 955101, 2865303, 10142263, 30426789, 70995841, 91280367, 212987523, 638962569]

約数ペア:

[(1, 638962569), (3, 212987523), (7, 91280367), (9, 70995841), (21, 30426789), (63, 10142263), (223, 2865303), (669, 955101), (1561, 409329), (2007, 318367), (4683, 136443), (14049, 45481)]