21495957

素因数分解:

$3^1\times 7^2\times {\mathrm{349}}^1\times {\mathrm{419}}^1$

素因数の和:785

約数の個数: 24

約数和(自身を含む): 33516000

約数和(自身を除く): 12020043

約数列:

[1, 3, 7, 21, 49, 147, 349, 419, 1047, 1257, 2443, 2933, 7329, 8799, 17101, 20531, 51303, 61593, 146231, 438693, 1023617, 3070851, 7165319, 21495957]

約数ペア:

[(1, 21495957), (3, 7165319), (7, 3070851), (21, 1023617), (49, 438693), (147, 146231), (349, 61593), (419, 51303), (1047, 20531), (1257, 17101), (2443, 8799), (2933, 7329)]