21839240

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{5009}}^1$

素因数の和:5129

約数の個数: 32

約数和(自身を含む): 49599000

約数和(自身を除く): 27759760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 5009, 10018, 20036, 25045, 40072, 50090, 100180, 200360, 545981, 1091962, 2183924, 2729905, 4367848, 5459810, 10919620, 21839240]

約数ペア:

[(1, 21839240), (2, 10919620), (4, 5459810), (5, 4367848), (8, 2729905), (10, 2183924), (20, 1091962), (40, 545981), (109, 200360), (218, 100180), (436, 50090), (545, 40072), (872, 25045), (1090, 20036), (2180, 10018), (4360, 5009)]