399140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{2851}}^1$

素因数の和:2867

約数の個数: 24

約数和(自身を含む): 958272

約数和(自身を除く): 559132

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 2851, 5702, 11404, 14255, 19957, 28510, 39914, 57020, 79828, 99785, 199570, 399140]

約数ペア:

[(1, 399140), (2, 199570), (4, 99785), (5, 79828), (7, 57020), (10, 39914), (14, 28510), (20, 19957), (28, 14255), (35, 11404), (70, 5702), (140, 2851)]