21061209

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{653}}^1\times {\mathrm{827}}^1$

素因数の和:1496

約数の個数: 16

約数和(自身を含む): 30324672

約数和(自身を除く): 9263463

約数列:

[1, 3, 13, 39, 653, 827, 1959, 2481, 8489, 10751, 25467, 32253, 540031, 1620093, 7020403, 21061209]

約数ペア:

[(1, 21061209), (3, 7020403), (13, 1620093), (39, 540031), (653, 32253), (827, 25467), (1959, 10751), (2481, 8489)]