217872820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{990331}}^1$

素因数の和:990351

約数の個数: 24

約数和(自身を含む): 499127328

約数和(自身を除く): 281254508

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 990331, 1980662, 3961324, 4951655, 9903310, 10893641, 19806620, 21787282, 43574564, 54468205, 108936410, 217872820]

約数ペア:

[(1, 217872820), (2, 108936410), (4, 54468205), (5, 43574564), (10, 21787282), (11, 19806620), (20, 10893641), (22, 9903310), (44, 4951655), (55, 3961324), (110, 1980662), (220, 990331)]