21502539

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{953}}^1$

素因数の和:1091

約数の個数: 24

約数和(自身を含む): 32741280

約数和(自身を除く): 11238741

約数列:

[1, 3, 9, 23, 69, 109, 207, 327, 953, 981, 2507, 2859, 7521, 8577, 21919, 22563, 65757, 103877, 197271, 311631, 934893, 2389171, 7167513, 21502539]

約数ペア:

[(1, 21502539), (3, 7167513), (9, 2389171), (23, 934893), (69, 311631), (109, 197271), (207, 103877), (327, 65757), (953, 22563), (981, 21919), (2507, 8577), (2859, 7521)]