21210301

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{2803}}^1$

素因数の和:2880

約数の個数: 16

約数和(自身を含む): 25841664

約数和(自身を除く): 4631363

約数列:

[1, 7, 23, 47, 161, 329, 1081, 2803, 7567, 19621, 64469, 131741, 451283, 922187, 3030043, 21210301]

約数ペア:

[(1, 21210301), (7, 3030043), (23, 922187), (47, 451283), (161, 131741), (329, 64469), (1081, 19621), (2803, 7567)]