19981956

素因数分解:

$2^2\times 3^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{499}}^1$

素因数の和:624

約数の個数: 48

約数和(自身を含む): 48384000

約数和(自身を除く): 28402044

約数列:

[1, 2, 3, 4, 6, 12, 47, 71, 94, 141, 142, 188, 213, 282, 284, 426, 499, 564, 852, 998, 1497, 1996, 2994, 3337, 5988, 6674, 10011, 13348, 20022, 23453, 35429, 40044, 46906, 70359, 70858, 93812, 106287, 140718, 141716, 212574, 281436, 425148, 1665163, 3330326, 4995489, 6660652, 9990978, 19981956]

約数ペア:

[(1, 19981956), (2, 9990978), (3, 6660652), (4, 4995489), (6, 3330326), (12, 1665163), (47, 425148), (71, 281436), (94, 212574), (141, 141716), (142, 140718), (188, 106287), (213, 93812), (282, 70858), (284, 70359), (426, 46906), (499, 40044), (564, 35429), (852, 23453), (998, 20022), (1497, 13348), (1996, 10011), (2994, 6674), (3337, 5988)]