21127915

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{4481}}^1$

素因数の和:4550

約数の個数: 16

約数和(自身を含む): 27107136

約数和(自身を除く): 5979221

約数列:

[1, 5, 23, 41, 115, 205, 943, 4481, 4715, 22405, 103063, 183721, 515315, 918605, 4225583, 21127915]

約数ペア:

[(1, 21127915), (5, 4225583), (23, 918605), (41, 515315), (115, 183721), (205, 103063), (943, 22405), (4481, 4715)]