21249783

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{6101}}^1$

素因数の和:6156

約数の個数: 20

約数和(自身を含む): 32487048

約数和(自身を除く): 11237265

約数列:

[1, 3, 9, 27, 43, 81, 129, 387, 1161, 3483, 6101, 18303, 54909, 164727, 262343, 494181, 787029, 2361087, 7083261, 21249783]

約数ペア:

[(1, 21249783), (3, 7083261), (9, 2361087), (27, 787029), (43, 494181), (81, 262343), (129, 164727), (387, 54909), (1161, 18303), (3483, 6101)]