21238281

素因数分解:

$3^4\times {\mathrm{79}}^1\times {\mathrm{3319}}^1$

素因数の和:3410

約数の個数: 20

約数和(自身を含む): 32137600

約数和(自身を除く): 10899319

約数列:

[1, 3, 9, 27, 79, 81, 237, 711, 2133, 3319, 6399, 9957, 29871, 89613, 262201, 268839, 786603, 2359809, 7079427, 21238281]

約数ペア:

[(1, 21238281), (3, 7079427), (9, 2359809), (27, 786603), (79, 268839), (81, 262201), (237, 89613), (711, 29871), (2133, 9957), (3319, 6399)]