21500245

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^2$

素因数の和:229

約数の個数: 24

約数和(自身を含む): 28672056

約数和(自身を除く): 7171811

約数列:

[1, 5, 13, 53, 65, 79, 265, 395, 689, 1027, 3445, 4187, 5135, 6241, 20935, 31205, 54431, 81133, 272155, 330773, 405665, 1653865, 4300049, 21500245]

約数ペア:

[(1, 21500245), (5, 4300049), (13, 1653865), (53, 405665), (65, 330773), (79, 272155), (265, 81133), (395, 54431), (689, 31205), (1027, 20935), (3445, 6241), (4187, 5135)]