21005685

素因数分解:

$3^2\times 5^1\times {\mathrm{577}}^1\times {\mathrm{809}}^1$

素因数の和:1397

約数の個数: 24

約数和(自身を含む): 36518040

約数和(自身を除く): 15512355

約数列:

[1, 3, 5, 9, 15, 45, 577, 809, 1731, 2427, 2885, 4045, 5193, 7281, 8655, 12135, 25965, 36405, 466793, 1400379, 2333965, 4201137, 7001895, 21005685]

約数ペア:

[(1, 21005685), (3, 7001895), (5, 4201137), (9, 2333965), (15, 1400379), (45, 466793), (577, 36405), (809, 25965), (1731, 12135), (2427, 8655), (2885, 7281), (4045, 5193)]