20805505

素因数分解:

$5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{4339}}^1$

素因数の和:4488

約数の個数: 16

約数和(自身を含む): 28748160

約数和(自身を除く): 7942655

約数列:

[1, 5, 7, 35, 137, 685, 959, 4339, 4795, 21695, 30373, 151865, 594443, 2972215, 4161101, 20805505]

約数ペア:

[(1, 20805505), (5, 4161101), (7, 2972215), (35, 594443), (137, 151865), (685, 30373), (959, 21695), (4339, 4795)]