81891005

素因数分解:

$5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{4231}}^1$

素因数の和:4329

約数の個数: 24

約数和(自身を含む): 115787520

約数和(自身を除く): 33896515

約数列:

[1, 5, 7, 35, 49, 79, 245, 395, 553, 2765, 3871, 4231, 19355, 21155, 29617, 148085, 207319, 334249, 1036595, 1671245, 2339743, 11698715, 16378201, 81891005]

約数ペア:

[(1, 81891005), (5, 16378201), (7, 11698715), (35, 2339743), (49, 1671245), (79, 1036595), (245, 334249), (395, 207319), (553, 148085), (2765, 29617), (3871, 21155), (4231, 19355)]