21356403

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{7901}}^1$

素因数の和:7974

約数の個数: 16

約数和(自身を含む): 30722976

約数和(自身を除く): 9366573

約数列:

[1, 3, 17, 51, 53, 159, 901, 2703, 7901, 23703, 134317, 402951, 418753, 1256259, 7118801, 21356403]

約数ペア:

[(1, 21356403), (3, 7118801), (17, 1256259), (51, 418753), (53, 402951), (159, 134317), (901, 23703), (2703, 7901)]