21047990

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{91513}}^1$

素因数の和:91543

約数の個数: 16

約数和(自身を含む): 39534048

約数和(自身を除く): 18486058

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 91513, 183026, 457565, 915130, 2104799, 4209598, 10523995, 21047990]

約数ペア:

[(1, 21047990), (2, 10523995), (5, 4209598), (10, 2104799), (23, 915130), (46, 457565), (115, 183026), (230, 91513)]