20578185

素因数分解:

$3^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{487}}^1$

素因数の和:814

約数の個数: 32

約数和(自身を含む): 36775680

約数和(自身を除く): 16197495

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 313, 487, 939, 1461, 1565, 2435, 2817, 4383, 4695, 7305, 8451, 13149, 14085, 21915, 42255, 65745, 152431, 457293, 762155, 1371879, 2286465, 4115637, 6859395, 20578185]

約数ペア:

[(1, 20578185), (3, 6859395), (5, 4115637), (9, 2286465), (15, 1371879), (27, 762155), (45, 457293), (135, 152431), (313, 65745), (487, 42255), (939, 21915), (1461, 14085), (1565, 13149), (2435, 8451), (2817, 7305), (4383, 4695)]