18668975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1$

素因数の和:180

約数の個数: 48

約数和(自身を含む): 27498240

約数和(自身を除く): 8829265

約数列:

[1, 5, 13, 17, 25, 31, 65, 85, 109, 155, 221, 325, 403, 425, 527, 545, 775, 1105, 1417, 1853, 2015, 2635, 2725, 3379, 5525, 6851, 7085, 9265, 10075, 13175, 16895, 24089, 34255, 35425, 43927, 46325, 57443, 84475, 120445, 171275, 219635, 287215, 602225, 746759, 1098175, 1436075, 3733795, 18668975]

約数ペア:

[(1, 18668975), (5, 3733795), (13, 1436075), (17, 1098175), (25, 746759), (31, 602225), (65, 287215), (85, 219635), (109, 171275), (155, 120445), (221, 84475), (325, 57443), (403, 46325), (425, 43927), (527, 35425), (545, 34255), (775, 24089), (1105, 16895), (1417, 13175), (1853, 10075), (2015, 9265), (2635, 7085), (2725, 6851), (3379, 5525)]