20513199

素因数分解:

$3^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{6469}}^1$

素因数の和:6630

約数の個数: 16

約数和(自身を含む): 31470080

約数和(自身を除く): 10956881

約数列:

[1, 3, 7, 21, 151, 453, 1057, 3171, 6469, 19407, 45283, 135849, 976819, 2930457, 6837733, 20513199]

約数ペア:

[(1, 20513199), (3, 6837733), (7, 2930457), (21, 976819), (151, 135849), (453, 45283), (1057, 19407), (3171, 6469)]