281691837

素因数分解:

$3^4\times 7^3\times {\mathrm{10139}}^1$

素因数の和:10172

約数の個数: 40

約数和(自身を含む): 490776000

約数和(自身を除く): 209084163

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 343, 441, 567, 1029, 1323, 3087, 3969, 9261, 10139, 27783, 30417, 70973, 91251, 212919, 273753, 496811, 638757, 821259, 1490433, 1916271, 3477677, 4471299, 5748813, 10433031, 13413897, 31299093, 40241691, 93897279, 281691837]

約数ペア:

[(1, 281691837), (3, 93897279), (7, 40241691), (9, 31299093), (21, 13413897), (27, 10433031), (49, 5748813), (63, 4471299), (81, 3477677), (147, 1916271), (189, 1490433), (343, 821259), (441, 638757), (567, 496811), (1029, 273753), (1323, 212919), (3087, 91251), (3969, 70973), (9261, 30417), (10139, 27783)]