1390820

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{353}}^1$

素因数の和:559

約数の個数: 24

約数和(自身を含む): 2943864

約数和(自身を除く): 1553044

約数列:

[1, 2, 4, 5, 10, 20, 197, 353, 394, 706, 788, 985, 1412, 1765, 1970, 3530, 3940, 7060, 69541, 139082, 278164, 347705, 695410, 1390820]

約数ペア:

[(1, 1390820), (2, 695410), (4, 347705), (5, 278164), (10, 139082), (20, 69541), (197, 7060), (353, 3940), (394, 3530), (706, 1970), (788, 1765), (985, 1412)]