21900715

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{1213}}^1$

素因数の和:1398

約数の個数: 16

約数和(自身を含む): 27620928

約数和(自身を除く): 5720213

約数列:

[1, 5, 23, 115, 157, 785, 1213, 3611, 6065, 18055, 27899, 139495, 190441, 952205, 4380143, 21900715]

約数ペア:

[(1, 21900715), (5, 4380143), (23, 952205), (115, 190441), (157, 139495), (785, 27899), (1213, 18055), (3611, 6065)]