21256421

素因数分解:

${\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{239}}^1$

素因数の和:440

約数の個数: 16

約数和(自身を含む): 23347200

約数和(自身を除く): 2090779

約数列:

[1, 19, 31, 151, 239, 589, 2869, 4541, 4681, 7409, 36089, 88939, 140771, 685691, 1118759, 21256421]

約数ペア:

[(1, 21256421), (19, 1118759), (31, 685691), (151, 140771), (239, 88939), (589, 36089), (2869, 7409), (4541, 4681)]