21881680

素因数分解:

$2^4\times 5^1\times {\mathrm{273521}}^1$

素因数の和:273534

約数の個数: 20

約数和(自身を含む): 50875092

約数和(自身を除く): 28993412

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 273521, 547042, 1094084, 1367605, 2188168, 2735210, 4376336, 5470420, 10940840, 21881680]

約数ペア:

[(1, 21881680), (2, 10940840), (4, 5470420), (5, 4376336), (8, 2735210), (10, 2188168), (16, 1367605), (20, 1094084), (40, 547042), (80, 273521)]