218020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{991}}^1$

素因数の和:1011

約数の個数: 24

約数和(自身を含む): 499968

約数和(自身を除く): 281948

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 991, 1982, 3964, 4955, 9910, 10901, 19820, 21802, 43604, 54505, 109010, 218020]

約数ペア:

[(1, 218020), (2, 109010), (4, 54505), (5, 43604), (10, 21802), (11, 19820), (20, 10901), (22, 9910), (44, 4955), (55, 3964), (110, 1982), (220, 991)]