19810098201620

素因数分解:

$2^2\times 5^1\times {\mathrm{2551}}^1\times {\mathrm{388281031}}^1$

素因数の和:388283591

約数の個数: 24

約数和(自身を含む): 41617514133888

約数和(自身を除く): 21807415932268

約数列:

[1, 2, 4, 5, 10, 20, 2551, 5102, 10204, 12755, 25510, 51020, 388281031, 776562062, 1553124124, 1941405155, 3882810310, 7765620620, 990504910081, 1981009820162, 3962019640324, 4952524550405, 9905049100810, 19810098201620]

約数ペア:

[(1, 19810098201620), (2, 9905049100810), (4, 4952524550405), (5, 3962019640324), (10, 1981009820162), (20, 990504910081), (2551, 7765620620), (5102, 3882810310), (10204, 1941405155), (12755, 1553124124), (25510, 776562062), (51020, 388281031)]