21531639

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{13619}}^1$

素因数の和:13670

約数の個数: 16

約数和(自身を含む): 31380480

約数和(自身を除く): 9848841

約数列:

[1, 3, 17, 31, 51, 93, 527, 1581, 13619, 40857, 231523, 422189, 694569, 1266567, 7177213, 21531639]

約数ペア:

[(1, 21531639), (3, 7177213), (17, 1266567), (31, 694569), (51, 422189), (93, 231523), (527, 40857), (1581, 13619)]