18891621

素因数分解:

$3^2\times 7^1\times {\mathrm{227}}^1\times {\mathrm{1321}}^1$

素因数の和:1561

約数の個数: 24

約数和(自身を含む): 31347264

約数和(自身を除く): 12455643

約数列:

[1, 3, 7, 9, 21, 63, 227, 681, 1321, 1589, 2043, 3963, 4767, 9247, 11889, 14301, 27741, 83223, 299867, 899601, 2099069, 2698803, 6297207, 18891621]

約数ペア:

[(1, 18891621), (3, 6297207), (7, 2698803), (9, 2099069), (21, 899601), (63, 299867), (227, 83223), (681, 27741), (1321, 14301), (1589, 11889), (2043, 9247), (3963, 4767)]