21770651

素因数分解:

$7^2\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{101}}^1$

素因数の和:251

約数の個数: 24

約数和(自身を含む): 26372304

約数和(自身を除く): 4601653

約数列:

[1, 7, 49, 53, 83, 101, 371, 581, 707, 2597, 4067, 4399, 4949, 5353, 8383, 30793, 37471, 58681, 215551, 262297, 410767, 444299, 3110093, 21770651]

約数ペア:

[(1, 21770651), (7, 3110093), (49, 444299), (53, 410767), (83, 262297), (101, 215551), (371, 58681), (581, 37471), (707, 30793), (2597, 8383), (4067, 5353), (4399, 4949)]