20902504

素因数分解:

$2^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{211}}^1$

素因数の和:314

約数の個数: 64

約数和(自身を含む): 47318400

約数和(自身を除く): 26415896

約数列:

[1, 2, 4, 7, 8, 14, 28, 29, 56, 58, 61, 116, 122, 203, 211, 232, 244, 406, 422, 427, 488, 812, 844, 854, 1477, 1624, 1688, 1708, 1769, 2954, 3416, 3538, 5908, 6119, 7076, 11816, 12238, 12383, 12871, 14152, 24476, 24766, 25742, 42833, 48952, 49532, 51484, 85666, 90097, 99064, 102968, 171332, 180194, 342664, 360388, 373259, 720776, 746518, 1493036, 2612813, 2986072, 5225626, 10451252, 20902504]

約数ペア:

[(1, 20902504), (2, 10451252), (4, 5225626), (7, 2986072), (8, 2612813), (14, 1493036), (28, 746518), (29, 720776), (56, 373259), (58, 360388), (61, 342664), (116, 180194), (122, 171332), (203, 102968), (211, 99064), (232, 90097), (244, 85666), (406, 51484), (422, 49532), (427, 48952), (488, 42833), (812, 25742), (844, 24766), (854, 24476), (1477, 14152), (1624, 12871), (1688, 12383), (1708, 12238), (1769, 11816), (2954, 7076), (3416, 6119), (3538, 5908)]