20721968

素因数分解:

$2^4\times {\mathrm{101}}^1\times {\mathrm{12823}}^1$

素因数の和:12932

約数の個数: 20

約数和(自身を含む): 40549488

約数和(自身を除く): 19827520

約数列:

[1, 2, 4, 8, 16, 101, 202, 404, 808, 1616, 12823, 25646, 51292, 102584, 205168, 1295123, 2590246, 5180492, 10360984, 20721968]

約数ペア:

[(1, 20721968), (2, 10360984), (4, 5180492), (8, 2590246), (16, 1295123), (101, 205168), (202, 102584), (404, 51292), (808, 25646), (1616, 12823)]