21990364

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{499781}}^1$

素因数の和:499796

約数の個数: 12

約数和(自身を含む): 41981688

約数和(自身を除く): 19991324

約数列:

[1, 2, 4, 11, 22, 44, 499781, 999562, 1999124, 5497591, 10995182, 21990364]

約数ペア:

[(1, 21990364), (2, 10995182), (4, 5497591), (11, 1999124), (22, 999562), (44, 499781)]