1981340

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{631}}^1$

素因数の和:797

約数の個数: 24

約数和(自身を含む): 4193952

約数和(自身を除く): 2212612

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 631, 785, 1262, 1570, 2524, 3140, 3155, 6310, 12620, 99067, 198134, 396268, 495335, 990670, 1981340]

約数ペア:

[(1, 1981340), (2, 990670), (4, 495335), (5, 396268), (10, 198134), (20, 99067), (157, 12620), (314, 6310), (628, 3155), (631, 3140), (785, 2524), (1262, 1570)]