21716980

素因数分解:

$2^2\times 5^1\times {\mathrm{701}}^1\times {\mathrm{1549}}^1$

素因数の和:2259

約数の個数: 24

約数和(自身を含む): 45700200

約数和(自身を除く): 23983220

約数列:

[1, 2, 4, 5, 10, 20, 701, 1402, 1549, 2804, 3098, 3505, 6196, 7010, 7745, 14020, 15490, 30980, 1085849, 2171698, 4343396, 5429245, 10858490, 21716980]

約数ペア:

[(1, 21716980), (2, 10858490), (4, 5429245), (5, 4343396), (10, 2171698), (20, 1085849), (701, 30980), (1402, 15490), (1549, 14020), (2804, 7745), (3098, 7010), (3505, 6196)]