21740405

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{2393}}^1$

素因数の和:2500

約数の個数: 16

約数和(自身を含む): 27578880

約数和(自身を除く): 5838475

約数列:

[1, 5, 23, 79, 115, 395, 1817, 2393, 9085, 11965, 55039, 189047, 275195, 945235, 4348081, 21740405]

約数ペア:

[(1, 21740405), (5, 4348081), (23, 945235), (79, 275195), (115, 189047), (395, 55039), (1817, 11965), (2393, 9085)]