19729775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{3571}}^1$

素因数の和:3611

約数の個数: 24

約数和(自身を含む): 27904464

約数和(自身を除く): 8174689

約数列:

[1, 5, 13, 17, 25, 65, 85, 221, 325, 425, 1105, 3571, 5525, 17855, 46423, 60707, 89275, 232115, 303535, 789191, 1160575, 1517675, 3945955, 19729775]

約数ペア:

[(1, 19729775), (5, 3945955), (13, 1517675), (17, 1160575), (25, 789191), (65, 303535), (85, 232115), (221, 89275), (325, 60707), (425, 46423), (1105, 17855), (3571, 5525)]