21000681185

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{16601329}}^1$

素因数の和:16601368

約数の個数: 16

約数和(自身を含む): 28687098240

約数和(自身を除く): 7686417055

約数列:

[1, 5, 11, 23, 55, 115, 253, 1265, 16601329, 83006645, 182614619, 381830567, 913073095, 1909152835, 4200136237, 21000681185]

約数ペア:

[(1, 21000681185), (5, 4200136237), (11, 1909152835), (23, 913073095), (55, 381830567), (115, 182614619), (253, 83006645), (1265, 16601329)]