21720435

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131639}}^1$

素因数の和:131658

約数の個数: 16

約数和(自身を含む): 37912320

約数和(自身を除く): 16191885

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 131639, 394917, 658195, 1448029, 1974585, 4344087, 7240145, 21720435]

約数ペア:

[(1, 21720435), (3, 7240145), (5, 4344087), (11, 1974585), (15, 1448029), (33, 658195), (55, 394917), (165, 131639)]