21705268

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{5879}}^1$

素因数の和:5967

約数の個数: 24

約数和(自身を含む): 41489280

約数和(自身を除く): 19784012

約数列:

[1, 2, 4, 13, 26, 52, 71, 142, 284, 923, 1846, 3692, 5879, 11758, 23516, 76427, 152854, 305708, 417409, 834818, 1669636, 5426317, 10852634, 21705268]

約数ペア:

[(1, 21705268), (2, 10852634), (4, 5426317), (13, 1669636), (26, 834818), (52, 417409), (71, 305708), (142, 152854), (284, 76427), (923, 23516), (1846, 11758), (3692, 5879)]