21207345

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19913}}^1$

素因数の和:19992

約数の個数: 16

約数和(自身を含む): 34411392

約数和(自身を除く): 13204047

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19913, 59739, 99565, 298695, 1413823, 4241469, 7069115, 21207345]

約数ペア:

[(1, 21207345), (3, 7069115), (5, 4241469), (15, 1413823), (71, 298695), (213, 99565), (355, 59739), (1065, 19913)]