81006875

素因数分解:

$5^4\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1$

素因数の和:201

約数の個数: 40

約数和(自身を含む): 108265344

約数和(自身を除く): 27258469

約数列:

[1, 5, 25, 31, 37, 113, 125, 155, 185, 565, 625, 775, 925, 1147, 2825, 3503, 3875, 4181, 4625, 5735, 14125, 17515, 19375, 20905, 23125, 28675, 70625, 87575, 104525, 129611, 143375, 437875, 522625, 648055, 716875, 2189375, 2613125, 3240275, 16201375, 81006875]

約数ペア:

[(1, 81006875), (5, 16201375), (25, 3240275), (31, 2613125), (37, 2189375), (113, 716875), (125, 648055), (155, 522625), (185, 437875), (565, 143375), (625, 129611), (775, 104525), (925, 87575), (1147, 70625), (2825, 28675), (3503, 23125), (3875, 20905), (4181, 19375), (4625, 17515), (5735, 14125)]