21481209

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{1181}}^1$

素因数の和:1277

約数の個数: 24

約数和(自身を含む): 32452992

約数和(自身を除く): 10971783

約数列:

[1, 3, 9, 43, 47, 129, 141, 387, 423, 1181, 2021, 3543, 6063, 10629, 18189, 50783, 55507, 152349, 166521, 457047, 499563, 2386801, 7160403, 21481209]

約数ペア:

[(1, 21481209), (3, 7160403), (9, 2386801), (43, 499563), (47, 457047), (129, 166521), (141, 152349), (387, 55507), (423, 50783), (1181, 18189), (2021, 10629), (3543, 6063)]