21390993

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{60943}}^1$

素因数の和:60965

約数の個数: 16

約数和(自身を含む): 34128640

約数和(自身を除く): 12737647

約数列:

[1, 3, 9, 13, 27, 39, 117, 351, 60943, 182829, 548487, 792259, 1645461, 2376777, 7130331, 21390993]

約数ペア:

[(1, 21390993), (3, 7130331), (9, 2376777), (13, 1645461), (27, 792259), (39, 548487), (117, 182829), (351, 60943)]