21984910

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{1637}}^1$

素因数の和:1740

約数の個数: 32

約数和(自身を含む): 42456960

約数和(自身を除く): 20472050

約数列:

[1, 2, 5, 10, 17, 34, 79, 85, 158, 170, 395, 790, 1343, 1637, 2686, 3274, 6715, 8185, 13430, 16370, 27829, 55658, 129323, 139145, 258646, 278290, 646615, 1293230, 2198491, 4396982, 10992455, 21984910]

約数ペア:

[(1, 21984910), (2, 10992455), (5, 4396982), (10, 2198491), (17, 1293230), (34, 646615), (79, 278290), (85, 258646), (158, 139145), (170, 129323), (395, 55658), (790, 27829), (1343, 16370), (1637, 13430), (2686, 8185), (3274, 6715)]