21731458

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{67489}}^1$

素因数の和:67521

約数の個数: 16

約数和(自身を含む): 38874240

約数和(自身を除く): 17142782

約数列:

[1, 2, 7, 14, 23, 46, 161, 322, 67489, 134978, 472423, 944846, 1552247, 3104494, 10865729, 21731458]

約数ペア:

[(1, 21731458), (2, 10865729), (7, 3104494), (14, 1552247), (23, 944846), (46, 472423), (161, 134978), (322, 67489)]