21685881

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{5087}}^1$

素因数の和:5133

約数の個数: 24

約数和(自身を含む): 34801920

約数和(自身を除く): 13116039

約数列:

[1, 3, 7, 21, 29, 49, 87, 147, 203, 609, 1421, 4263, 5087, 15261, 35609, 106827, 147523, 249263, 442569, 747789, 1032661, 3097983, 7228627, 21685881]

約数ペア:

[(1, 21685881), (3, 7228627), (7, 3097983), (21, 1032661), (29, 747789), (49, 442569), (87, 249263), (147, 147523), (203, 106827), (609, 35609), (1421, 15261), (4263, 5087)]