20991025

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{2063}}^1$

素因数の和:2121

約数の個数: 24

約数和(自身を含む): 29176704

約数和(自身を除く): 8185679

約数列:

[1, 5, 11, 25, 37, 55, 185, 275, 407, 925, 2035, 2063, 10175, 10315, 22693, 51575, 76331, 113465, 381655, 567325, 839641, 1908275, 4198205, 20991025]

約数ペア:

[(1, 20991025), (5, 4198205), (11, 1908275), (25, 839641), (37, 567325), (55, 381655), (185, 113465), (275, 76331), (407, 51575), (925, 22693), (2035, 10315), (2063, 10175)]