20778435

素因数分解:

$3^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1187}}^1$

素因数の和:1587

約数の個数: 24

約数和(自身を含む): 36138960

約数和(自身を除く): 15360525

約数列:

[1, 3, 5, 9, 15, 45, 389, 1167, 1187, 1945, 3501, 3561, 5835, 5935, 10683, 17505, 17805, 53415, 461743, 1385229, 2308715, 4155687, 6926145, 20778435]

約数ペア:

[(1, 20778435), (3, 6926145), (5, 4155687), (9, 2308715), (15, 1385229), (45, 461743), (389, 53415), (1167, 17805), (1187, 17505), (1945, 10683), (3501, 5935), (3561, 5835)]