81403985

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{569}}^1$

素因数の和:689

約数の個数: 32

約数和(自身を含む): 110315520

約数和(自身を除く): 28911535

約数列:

[1, 5, 13, 31, 65, 71, 155, 355, 403, 569, 923, 2015, 2201, 2845, 4615, 7397, 11005, 17639, 28613, 36985, 40399, 88195, 143065, 201995, 229307, 525187, 1146535, 1252369, 2625935, 6261845, 16280797, 81403985]

約数ペア:

[(1, 81403985), (5, 16280797), (13, 6261845), (31, 2625935), (65, 1252369), (71, 1146535), (155, 525187), (355, 229307), (403, 201995), (569, 143065), (923, 88195), (2015, 40399), (2201, 36985), (2845, 28613), (4615, 17639), (7397, 11005)]