21289269

素因数分解:

$3^1\times {\mathrm{97}}^1\times {\mathrm{149}}^1\times {\mathrm{491}}^1$

素因数の和:740

約数の個数: 16

約数和(自身を含む): 28929600

約数和(自身を除く): 7640331

約数列:

[1, 3, 97, 149, 291, 447, 491, 1473, 14453, 43359, 47627, 73159, 142881, 219477, 7096423, 21289269]

約数ペア:

[(1, 21289269), (3, 7096423), (97, 219477), (149, 142881), (291, 73159), (447, 47627), (491, 43359), (1473, 14453)]