20696420

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13099}}^1$

素因数の和:13187

約数の個数: 24

約数和(自身を含む): 44016000

約数和(自身を除く): 23319580

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13099, 26198, 52396, 65495, 130990, 261980, 1034821, 2069642, 4139284, 5174105, 10348210, 20696420]

約数ペア:

[(1, 20696420), (2, 10348210), (4, 5174105), (5, 4139284), (10, 2069642), (20, 1034821), (79, 261980), (158, 130990), (316, 65495), (395, 52396), (790, 26198), (1580, 13099)]