21989177

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{257}}^1\times {\mathrm{719}}^1$

素因数の和:1000

約数の個数: 16

約数和(自身を含む): 26749440

約数和(自身を除く): 4760263

約数列:

[1, 7, 17, 119, 257, 719, 1799, 4369, 5033, 12223, 30583, 85561, 184783, 1293481, 3141311, 21989177]

約数ペア:

[(1, 21989177), (7, 3141311), (17, 1293481), (119, 184783), (257, 85561), (719, 30583), (1799, 12223), (4369, 5033)]