21997665

素因数分解:

$3^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{2999}}^1$

素因数の和:3173

約数の個数: 24

約数和(自身を含む): 38376000

約数和(自身を除く): 16378335

約数列:

[1, 3, 5, 9, 15, 45, 163, 489, 815, 1467, 2445, 2999, 7335, 8997, 14995, 26991, 44985, 134955, 488837, 1466511, 2444185, 4399533, 7332555, 21997665]

約数ペア:

[(1, 21997665), (3, 7332555), (5, 4399533), (9, 2444185), (15, 1466511), (45, 488837), (163, 134955), (489, 44985), (815, 26991), (1467, 14995), (2445, 8997), (2999, 7335)]