389638823

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 469862400

約数和(自身を除く): 80223577

約数列:

[1, 7, 37, 79, 137, 139, 259, 553, 959, 973, 2923, 5069, 5143, 10823, 10981, 19043, 20461, 35483, 36001, 75761, 76867, 133301, 400451, 406297, 704591, 1504397, 2803157, 2844079, 4932137, 10530779, 55662689, 389638823]

約数ペア:

[(1, 389638823), (7, 55662689), (37, 10530779), (79, 4932137), (137, 2844079), (139, 2803157), (259, 1504397), (553, 704591), (959, 406297), (973, 400451), (2923, 133301), (5069, 76867), (5143, 75761), (10823, 36001), (10981, 35483), (19043, 20461)]