213888521

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{991}}^1\times {\mathrm{2803}}^1$

素因数の和:3812

約数の個数: 16

約数和(自身を含む): 267030528

約数和(自身を除く): 53142007

約数列:

[1, 7, 11, 77, 991, 2803, 6937, 10901, 19621, 30833, 76307, 215831, 2777773, 19444411, 30555503, 213888521]

約数ペア:

[(1, 213888521), (7, 30555503), (11, 19444411), (77, 2777773), (991, 215831), (2803, 76307), (6937, 30833), (10901, 19621)]