21897561

素因数分解:

$3^1\times 7^2\times {\mathrm{181}}^1\times {\mathrm{823}}^1$

素因数の和:1021

約数の個数: 24

約数和(自身を含む): 34192704

約数和(自身を除く): 12295143

約数列:

[1, 3, 7, 21, 49, 147, 181, 543, 823, 1267, 2469, 3801, 5761, 8869, 17283, 26607, 40327, 120981, 148963, 446889, 1042741, 3128223, 7299187, 21897561]

約数ペア:

[(1, 21897561), (3, 7299187), (7, 3128223), (21, 1042741), (49, 446889), (147, 148963), (181, 120981), (543, 40327), (823, 26607), (1267, 17283), (2469, 8869), (3801, 5761)]