81991161

素因数分解:

$3^2\times 7^2\times {\mathrm{89}}^1\times {\mathrm{2089}}^1$

素因数の和:2198

約数の個数: 36

約数和(自身を含む): 139382100

約数和(自身を除く): 57390939

約数列:

[1, 3, 7, 9, 21, 49, 63, 89, 147, 267, 441, 623, 801, 1869, 2089, 4361, 5607, 6267, 13083, 14623, 18801, 39249, 43869, 102361, 131607, 185921, 307083, 557763, 921249, 1301447, 1673289, 3904341, 9110129, 11713023, 27330387, 81991161]

約数ペア:

[(1, 81991161), (3, 27330387), (7, 11713023), (9, 9110129), (21, 3904341), (49, 1673289), (63, 1301447), (89, 921249), (147, 557763), (267, 307083), (441, 185921), (623, 131607), (801, 102361), (1869, 43869), (2089, 39249), (4361, 18801), (5607, 14623), (6267, 13083)]