19818175

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{211}}^1$

素因数の和:268

約数の個数: 36

約数和(自身を含む): 28246456

約数和(自身を除く): 8428281

約数列:

[1, 5, 13, 17, 25, 65, 85, 211, 221, 289, 325, 425, 1055, 1105, 1445, 2743, 3587, 3757, 5275, 5525, 7225, 13715, 17935, 18785, 46631, 60979, 68575, 89675, 93925, 233155, 304895, 792727, 1165775, 1524475, 3963635, 19818175]

約数ペア:

[(1, 19818175), (5, 3963635), (13, 1524475), (17, 1165775), (25, 792727), (65, 304895), (85, 233155), (211, 93925), (221, 89675), (289, 68575), (325, 60979), (425, 46631), (1055, 18785), (1105, 17935), (1445, 13715), (2743, 7225), (3587, 5525), (3757, 5275)]