21340735

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{397}}^1\times {\mathrm{827}}^1$

素因数の和:1242

約数の個数: 16

約数和(自身を含む): 27681696

約数和(自身を除く): 6340961

約数列:

[1, 5, 13, 65, 397, 827, 1985, 4135, 5161, 10751, 25805, 53755, 328319, 1641595, 4268147, 21340735]

約数ペア:

[(1, 21340735), (5, 4268147), (13, 1641595), (65, 328319), (397, 53755), (827, 25805), (1985, 10751), (4135, 5161)]