21243290

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{389}}^1$

素因数の和:566

約数の個数: 32

約数和(自身を含む): 39536640

約数和(自身を除く): 18293350

約数列:

[1, 2, 5, 10, 43, 86, 127, 215, 254, 389, 430, 635, 778, 1270, 1945, 3890, 5461, 10922, 16727, 27305, 33454, 49403, 54610, 83635, 98806, 167270, 247015, 494030, 2124329, 4248658, 10621645, 21243290]

約数ペア:

[(1, 21243290), (2, 10621645), (5, 4248658), (10, 2124329), (43, 494030), (86, 247015), (127, 167270), (215, 98806), (254, 83635), (389, 54610), (430, 49403), (635, 33454), (778, 27305), (1270, 16727), (1945, 10922), (3890, 5461)]