21381304

素因数分解:

$2^3\times 7^1\times {\mathrm{191}}^1\times {\mathrm{1999}}^1$

素因数の和:2203

約数の個数: 32

約数和(自身を含む): 46080000

約数和(自身を除く): 24698696

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 191, 382, 764, 1337, 1528, 1999, 2674, 3998, 5348, 7996, 10696, 13993, 15992, 27986, 55972, 111944, 381809, 763618, 1527236, 2672663, 3054472, 5345326, 10690652, 21381304]

約数ペア:

[(1, 21381304), (2, 10690652), (4, 5345326), (7, 3054472), (8, 2672663), (14, 1527236), (28, 763618), (56, 381809), (191, 111944), (382, 55972), (764, 27986), (1337, 15992), (1528, 13993), (1999, 10696), (2674, 7996), (3998, 5348)]