664839

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:247

約数の個数: 24

約数和(自身を含む): 1121952

約数和(自身を除く): 457113

約数列:

[1, 3, 7, 9, 21, 61, 63, 173, 183, 427, 519, 549, 1211, 1281, 1557, 3633, 3843, 10553, 10899, 31659, 73871, 94977, 221613, 664839]

約数ペア:

[(1, 664839), (3, 221613), (7, 94977), (9, 73871), (21, 31659), (61, 10899), (63, 10553), (173, 3843), (183, 3633), (427, 1557), (519, 1281), (549, 1211)]