21212170

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{389}}^1$

素因数の和:463

約数の個数: 64

約数和(自身を含む): 47174400

約数和(自身を除く): 25962230

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 41, 70, 82, 95, 133, 190, 205, 266, 287, 389, 410, 574, 665, 778, 779, 1330, 1435, 1558, 1945, 2723, 2870, 3890, 3895, 5446, 5453, 7391, 7790, 10906, 13615, 14782, 15949, 27230, 27265, 31898, 36955, 51737, 54530, 73910, 79745, 103474, 111643, 159490, 223286, 258685, 303031, 517370, 558215, 606062, 1116430, 1515155, 2121217, 3030310, 4242434, 10606085, 21212170]

約数ペア:

[(1, 21212170), (2, 10606085), (5, 4242434), (7, 3030310), (10, 2121217), (14, 1515155), (19, 1116430), (35, 606062), (38, 558215), (41, 517370), (70, 303031), (82, 258685), (95, 223286), (133, 159490), (190, 111643), (205, 103474), (266, 79745), (287, 73910), (389, 54530), (410, 51737), (574, 36955), (665, 31898), (778, 27265), (779, 27230), (1330, 15949), (1435, 14782), (1558, 13615), (1945, 10906), (2723, 7790), (2870, 7391), (3890, 5453), (3895, 5446)]