2781640

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{353}}^1$

素因数の和:561

約数の個数: 32

約数和(自身を含む): 6308280

約数和(自身を除く): 3526640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 353, 394, 706, 788, 985, 1412, 1576, 1765, 1970, 2824, 3530, 3940, 7060, 7880, 14120, 69541, 139082, 278164, 347705, 556328, 695410, 1390820, 2781640]

約数ペア:

[(1, 2781640), (2, 1390820), (4, 695410), (5, 556328), (8, 347705), (10, 278164), (20, 139082), (40, 69541), (197, 14120), (353, 7880), (394, 7060), (706, 3940), (788, 3530), (985, 2824), (1412, 1970), (1576, 1765)]