664540

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{223}}^1$

素因数の和:381

約数の個数: 24

約数和(自身を含む): 1411200

約数和(自身を除く): 746660

約数列:

[1, 2, 4, 5, 10, 20, 149, 223, 298, 446, 596, 745, 892, 1115, 1490, 2230, 2980, 4460, 33227, 66454, 132908, 166135, 332270, 664540]

約数ペア:

[(1, 664540), (2, 332270), (4, 166135), (5, 132908), (10, 66454), (20, 33227), (149, 4460), (223, 2980), (298, 2230), (446, 1490), (596, 1115), (745, 892)]