18881331

素因数分解:

$3^1\times 7^1\times {\mathrm{563}}^1\times {\mathrm{1597}}^1$

素因数の和:2170

約数の個数: 16

約数和(自身を含む): 28840704

約数和(自身を除く): 9959373

約数列:

[1, 3, 7, 21, 563, 1597, 1689, 3941, 4791, 11179, 11823, 33537, 899111, 2697333, 6293777, 18881331]

約数ペア:

[(1, 18881331), (3, 6293777), (7, 2697333), (21, 899111), (563, 33537), (1597, 11823), (1689, 11179), (3941, 4791)]