20972920

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6637}}^1$

素因数の和:6727

約数の個数: 32

約数和(自身を含む): 47793600

約数和(自身を除く): 26820680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6637, 13274, 26548, 33185, 53096, 66370, 132740, 265480, 524323, 1048646, 2097292, 2621615, 4194584, 5243230, 10486460, 20972920]

約数ペア:

[(1, 20972920), (2, 10486460), (4, 5243230), (5, 4194584), (8, 2621615), (10, 2097292), (20, 1048646), (40, 524323), (79, 265480), (158, 132740), (316, 66370), (395, 53096), (632, 33185), (790, 26548), (1580, 13274), (3160, 6637)]