21210049

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{163}}^1\times {\mathrm{641}}^1$

素因数の和:840

約数の個数: 16

約数和(自身を含む): 25269120

約数和(自身を除く): 4059071

約数列:

[1, 7, 29, 163, 203, 641, 1141, 4487, 4727, 18589, 33089, 104483, 130123, 731381, 3030007, 21210049]

約数ペア:

[(1, 21210049), (7, 3030007), (29, 731381), (163, 130123), (203, 104483), (641, 33089), (1141, 18589), (4487, 4727)]