21491397

素因数分解:

$3^2\times {\mathrm{79}}^1\times {\mathrm{167}}^1\times {\mathrm{181}}^1$

素因数の和:433

約数の個数: 24

約数和(自身を含む): 31799040

約数和(自身を除く): 10307643

約数列:

[1, 3, 9, 79, 167, 181, 237, 501, 543, 711, 1503, 1629, 13193, 14299, 30227, 39579, 42897, 90681, 118737, 128691, 272043, 2387933, 7163799, 21491397]

約数ペア:

[(1, 21491397), (3, 7163799), (9, 2387933), (79, 272043), (167, 128691), (181, 118737), (237, 90681), (501, 42897), (543, 39579), (711, 30227), (1503, 14299), (1629, 13193)]