20091535

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{239}}^1$

素因数の和:327

約数の個数: 32

約数和(自身を含む): 27371520

約数和(自身を除く): 7279985

約数列:

[1, 5, 17, 23, 43, 85, 115, 215, 239, 391, 731, 989, 1195, 1955, 3655, 4063, 4945, 5497, 10277, 16813, 20315, 27485, 51385, 84065, 93449, 174709, 236371, 467245, 873545, 1181855, 4018307, 20091535]

約数ペア:

[(1, 20091535), (5, 4018307), (17, 1181855), (23, 873545), (43, 467245), (85, 236371), (115, 174709), (215, 93449), (239, 84065), (391, 51385), (731, 27485), (989, 20315), (1195, 16813), (1955, 10277), (3655, 5497), (4063, 4945)]