21380915

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{2089}}^1$

素因数の和:2206

約数の個数: 16

約数和(自身を含む): 27086400

約数和(自身を除く): 5705485

約数列:

[1, 5, 23, 89, 115, 445, 2047, 2089, 10235, 10445, 48047, 185921, 240235, 929605, 4276183, 21380915]

約数ペア:

[(1, 21380915), (5, 4276183), (23, 929605), (89, 240235), (115, 185921), (445, 48047), (2047, 10445), (2089, 10235)]