21685631

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{127}}^1$

素因数の和:219

約数の個数: 24

約数和(自身を含む): 25749504

約数和(自身を除く): 4063873

約数列:

[1, 11, 19, 43, 127, 209, 361, 473, 817, 1397, 2413, 3971, 5461, 8987, 15523, 26543, 45847, 60071, 103759, 170753, 504317, 1141349, 1971421, 21685631]

約数ペア:

[(1, 21685631), (11, 1971421), (19, 1141349), (43, 504317), (127, 170753), (209, 103759), (361, 60071), (473, 45847), (817, 26543), (1397, 15523), (2413, 8987), (3971, 5461)]