21781419

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{17839}}^1$

素因数の和:17890

約数の個数: 16

約数和(自身を含む): 32540160

約数和(自身を除く): 10758741

約数列:

[1, 3, 11, 33, 37, 111, 407, 1221, 17839, 53517, 196229, 588687, 660043, 1980129, 7260473, 21781419]

約数ペア:

[(1, 21781419), (3, 7260473), (11, 1980129), (33, 660043), (37, 588687), (111, 196229), (407, 53517), (1221, 17839)]