21636405

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{68687}}^1$

素因数の和:68705

約数の個数: 24

約数和(自身を含む): 42861312

約数和(自身を除く): 21224907

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 68687, 206061, 343435, 480809, 618183, 1030305, 1442427, 2404045, 3090915, 4327281, 7212135, 21636405]

約数ペア:

[(1, 21636405), (3, 7212135), (5, 4327281), (7, 3090915), (9, 2404045), (15, 1442427), (21, 1030305), (35, 618183), (45, 480809), (63, 343435), (105, 206061), (315, 68687)]