21278518

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{19309}}^1$

素因数の和:19359

約数の個数: 16

約数和(自身を含む): 34758000

約数和(自身を除く): 13479482

約数列:

[1, 2, 19, 29, 38, 58, 551, 1102, 19309, 38618, 366871, 559961, 733742, 1119922, 10639259, 21278518]

約数ペア:

[(1, 21278518), (2, 10639259), (19, 1119922), (29, 733742), (38, 559961), (58, 366871), (551, 38618), (1102, 19309)]