21609951

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{157}}^1$

素因数の和:311

約数の個数: 32

約数和(自身を含む): 32702208

約数和(自身を除く): 11092257

約数列:

[1, 3, 11, 33, 43, 97, 129, 157, 291, 471, 473, 1067, 1419, 1727, 3201, 4171, 5181, 6751, 12513, 15229, 20253, 45687, 45881, 74261, 137643, 167519, 222783, 502557, 654847, 1964541, 7203317, 21609951]

約数ペア:

[(1, 21609951), (3, 7203317), (11, 1964541), (33, 654847), (43, 502557), (97, 222783), (129, 167519), (157, 137643), (291, 74261), (471, 45881), (473, 45687), (1067, 20253), (1419, 15229), (1727, 12513), (3201, 6751), (4171, 5181)]