21263305

素因数分解:

$5^1\times 7^2\times {\mathrm{59}}^1\times {\mathrm{1471}}^1$

素因数の和:1549

約数の個数: 24

約数和(自身を含む): 30205440

約数和(自身を除く): 8942135

約数列:

[1, 5, 7, 35, 49, 59, 245, 295, 413, 1471, 2065, 2891, 7355, 10297, 14455, 51485, 72079, 86789, 360395, 433945, 607523, 3037615, 4252661, 21263305]

約数ペア:

[(1, 21263305), (5, 4252661), (7, 3037615), (35, 607523), (49, 433945), (59, 360395), (245, 86789), (295, 72079), (413, 51485), (1471, 14455), (2065, 10297), (2891, 7355)]