64405540

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{40763}}^1$

素因数の和:40851

約数の個数: 24

約数和(自身を含む): 136967040

約数和(自身を除く): 72561500

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 40763, 81526, 163052, 203815, 407630, 815260, 3220277, 6440554, 12881108, 16101385, 32202770, 64405540]

約数ペア:

[(1, 64405540), (2, 32202770), (4, 16101385), (5, 12881108), (10, 6440554), (20, 3220277), (79, 815260), (158, 407630), (316, 203815), (395, 163052), (790, 81526), (1580, 40763)]