21984095

素因数分解:

$5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{1471}}^1$

素因数の和:1551

約数の個数: 24

約数和(自身を含む): 31212288

約数和(自身を除く): 9228193

約数列:

[1, 5, 7, 35, 49, 61, 245, 305, 427, 1471, 2135, 2989, 7355, 10297, 14945, 51485, 72079, 89731, 360395, 448655, 628117, 3140585, 4396819, 21984095]

約数ペア:

[(1, 21984095), (5, 4396819), (7, 3140585), (35, 628117), (49, 448655), (61, 360395), (245, 89731), (305, 72079), (427, 51485), (1471, 14945), (2135, 10297), (2989, 7355)]