21890935

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{619}}^1\times {\mathrm{643}}^1$

素因数の和:1278

約数の個数: 16

約数和(自身を含む): 28748160

約数和(自身を除く): 6857225

約数列:

[1, 5, 11, 55, 619, 643, 3095, 3215, 6809, 7073, 34045, 35365, 398017, 1990085, 4378187, 21890935]

約数ペア:

[(1, 21890935), (5, 4378187), (11, 1990085), (55, 398017), (619, 35365), (643, 34045), (3095, 7073), (3215, 6809)]