21351901

素因数分解:

${\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:300

約数の個数: 16

約数和(自身を含む): 22809600

約数和(自身を除く): 1457699

約数列:

[1, 31, 71, 89, 109, 2201, 2759, 3379, 6319, 7739, 9701, 195889, 239909, 300731, 688771, 21351901]

約数ペア:

[(1, 21351901), (31, 688771), (71, 300731), (89, 239909), (109, 195889), (2201, 9701), (2759, 7739), (3379, 6319)]