21490091

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{419}}^1\times {\mathrm{431}}^1$

素因数の和:874

約数の個数: 16

約数和(自身を含む): 26127360

約数和(自身を除く): 4637269

約数列:

[1, 7, 17, 119, 419, 431, 2933, 3017, 7123, 7327, 49861, 51289, 180589, 1264123, 3070013, 21490091]

約数ペア:

[(1, 21490091), (7, 3070013), (17, 1264123), (119, 180589), (419, 51289), (431, 49861), (2933, 7327), (3017, 7123)]