21178185

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1997}}^1$

素因数の和:2113

約数の個数: 32

約数和(自身を含む): 39128832

約数和(自身を除く): 17950647

約数列:

[1, 3, 5, 7, 15, 21, 35, 101, 105, 303, 505, 707, 1515, 1997, 2121, 3535, 5991, 9985, 10605, 13979, 29955, 41937, 69895, 201697, 209685, 605091, 1008485, 1411879, 3025455, 4235637, 7059395, 21178185]

約数ペア:

[(1, 21178185), (3, 7059395), (5, 4235637), (7, 3025455), (15, 1411879), (21, 1008485), (35, 605091), (101, 209685), (105, 201697), (303, 69895), (505, 41937), (707, 29955), (1515, 13979), (1997, 10605), (2121, 9985), (3535, 5991)]