20550595

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:223

約数の個数: 32

約数和(自身を含む): 27748224

約数和(自身を除く): 7197629

約数列:

[1, 5, 13, 61, 65, 71, 73, 305, 355, 365, 793, 923, 949, 3965, 4331, 4453, 4615, 4745, 5183, 21655, 22265, 25915, 56303, 57889, 67379, 281515, 289445, 316163, 336895, 1580815, 4110119, 20550595]

約数ペア:

[(1, 20550595), (5, 4110119), (13, 1580815), (61, 336895), (65, 316163), (71, 289445), (73, 281515), (305, 67379), (355, 57889), (365, 56303), (793, 25915), (923, 22265), (949, 21655), (3965, 5183), (4331, 4745), (4453, 4615)]