18876557

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{1999}}^1$

素因数の和:2096

約数の個数: 16

約数和(自身を含む): 23040000

約数和(自身を除く): 4163443

約数列:

[1, 7, 19, 71, 133, 497, 1349, 1999, 9443, 13993, 37981, 141929, 265867, 993503, 2696651, 18876557]

約数ペア:

[(1, 18876557), (7, 2696651), (19, 993503), (71, 265867), (133, 141929), (497, 37981), (1349, 13993), (1999, 9443)]