21731751

素因数分解:

$3^2\times {\mathrm{71}}^2\times {\mathrm{479}}^1$

素因数の和:627

約数の個数: 18

約数和(自身を含む): 31905120

約数和(自身を除く): 10173369

約数列:

[1, 3, 9, 71, 213, 479, 639, 1437, 4311, 5041, 15123, 34009, 45369, 102027, 306081, 2414639, 7243917, 21731751]

約数ペア:

[(1, 21731751), (3, 7243917), (9, 2414639), (71, 306081), (213, 102027), (479, 45369), (639, 34009), (1437, 15123), (4311, 5041)]