1991620010

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1971901}}^1$

素因数の和:1972009

約数の個数: 16

約数和(自身を含む): 3620412072

約数和(自身を除く): 1628792062

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 1971901, 3943802, 9859505, 19719010, 199162001, 398324002, 995810005, 1991620010]

約数ペア:

[(1, 1991620010), (2, 995810005), (5, 398324002), (10, 199162001), (101, 19719010), (202, 9859505), (505, 3943802), (1010, 1971901)]