21678363

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5641}}^1$

素因数の和:5715

約数の個数: 24

約数和(自身を含む): 36379616

約数和(自身を除く): 14701253

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5641, 16923, 39487, 50769, 118461, 344101, 355383, 1032303, 2408707, 3096909, 7226121, 21678363]

約数ペア:

[(1, 21678363), (3, 7226121), (7, 3096909), (9, 2408707), (21, 1032303), (61, 355383), (63, 344101), (183, 118461), (427, 50769), (549, 39487), (1281, 16923), (3843, 5641)]