21881704

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{210401}}^1$

素因数の和:210420

約数の個数: 16

約数和(自身を含む): 44184420

約数和(自身を除く): 22302716

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 210401, 420802, 841604, 1683208, 2735213, 5470426, 10940852, 21881704]

約数ペア:

[(1, 21881704), (2, 10940852), (4, 5470426), (8, 2735213), (13, 1683208), (26, 841604), (52, 420802), (104, 210401)]