21530920

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3929}}^1$

素因数の和:4077

約数の個数: 32

約数和(自身を含む): 48810600

約数和(自身を除く): 27279680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3929, 5480, 7858, 15716, 19645, 31432, 39290, 78580, 157160, 538273, 1076546, 2153092, 2691365, 4306184, 5382730, 10765460, 21530920]

約数ペア:

[(1, 21530920), (2, 10765460), (4, 5382730), (5, 4306184), (8, 2691365), (10, 2153092), (20, 1076546), (40, 538273), (137, 157160), (274, 78580), (548, 39290), (685, 31432), (1096, 19645), (1370, 15716), (2740, 7858), (3929, 5480)]