21401890

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{27091}}^1$

素因数の和:27177

約数の個数: 16

約数和(自身を含む): 39012480

約数和(自身を除く): 17610590

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 27091, 54182, 135455, 270910, 2140189, 4280378, 10700945, 21401890]

約数ペア:

[(1, 21401890), (2, 10700945), (5, 4280378), (10, 2140189), (79, 270910), (158, 135455), (395, 54182), (790, 27091)]