21142405

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{1171}}^1$

素因数の和:1356

約数の個数: 16

約数和(自身を含む): 26665344

約数和(自身を除く): 5522939

約数列:

[1, 5, 23, 115, 157, 785, 1171, 3611, 5855, 18055, 26933, 134665, 183847, 919235, 4228481, 21142405]

約数ペア:

[(1, 21142405), (5, 4228481), (23, 919235), (115, 183847), (157, 134665), (785, 26933), (1171, 18055), (3611, 5855)]