21787018

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{197}}^1\times {\mathrm{457}}^1$

素因数の和:678

約数の個数: 24

約数和(自身を含む): 36182916

約数和(自身を除く): 14395898

約数列:

[1, 2, 11, 22, 121, 197, 242, 394, 457, 914, 2167, 4334, 5027, 10054, 23837, 47674, 55297, 90029, 110594, 180058, 990319, 1980638, 10893509, 21787018]

約数ペア:

[(1, 21787018), (2, 10893509), (11, 1980638), (22, 990319), (121, 180058), (197, 110594), (242, 90029), (394, 55297), (457, 47674), (914, 23837), (2167, 10054), (4334, 5027)]