21199617

素因数分解:

$3^3\times {\mathrm{163}}^1\times {\mathrm{4817}}^1$

素因数の和:4989

約数の個数: 16

約数和(自身を含む): 31606080

約数和(自身を除く): 10406463

約数列:

[1, 3, 9, 27, 163, 489, 1467, 4401, 4817, 14451, 43353, 130059, 785171, 2355513, 7066539, 21199617]

約数ペア:

[(1, 21199617), (3, 7066539), (9, 2355513), (27, 785171), (163, 130059), (489, 43353), (1467, 14451), (4401, 4817)]