639947217

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1\times {\mathrm{593}}^1$

素因数の和:742

約数の個数: 64

約数和(自身を含む): 1085736960

約数和(自身を除く): 445789743

約数列:

[1, 3, 7, 13, 21, 39, 59, 67, 91, 177, 201, 273, 413, 469, 593, 767, 871, 1239, 1407, 1779, 2301, 2613, 3953, 4151, 5369, 6097, 7709, 11859, 12453, 16107, 18291, 23127, 27671, 34987, 39731, 51389, 53963, 83013, 104961, 119193, 154167, 161889, 244909, 278117, 359723, 454831, 516503, 734727, 834351, 1079169, 1364493, 1549509, 2344129, 3183817, 3615521, 7032387, 9551451, 10846563, 16408903, 30473677, 49226709, 91421031, 213315739, 639947217]

約数ペア:

[(1, 639947217), (3, 213315739), (7, 91421031), (13, 49226709), (21, 30473677), (39, 16408903), (59, 10846563), (67, 9551451), (91, 7032387), (177, 3615521), (201, 3183817), (273, 2344129), (413, 1549509), (469, 1364493), (593, 1079169), (767, 834351), (871, 734727), (1239, 516503), (1407, 454831), (1779, 359723), (2301, 278117), (2613, 244909), (3953, 161889), (4151, 154167), (5369, 119193), (6097, 104961), (7709, 83013), (11859, 53963), (12453, 51389), (16107, 39731), (18291, 34987), (23127, 27671)]