640111674

素因数分解:

$2^1\times 3^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{457}}^1$

素因数の和:655

約数の個数: 64

約数和(自身を含む): 1349377920

約数和(自身を除く): 709266246

約数列:

[1, 2, 3, 6, 43, 61, 86, 89, 122, 129, 178, 183, 258, 267, 366, 457, 534, 914, 1371, 2623, 2742, 3827, 5246, 5429, 7654, 7869, 10858, 11481, 15738, 16287, 19651, 22962, 27877, 32574, 39302, 40673, 55754, 58953, 81346, 83631, 117906, 122019, 167262, 233447, 244038, 466894, 700341, 1198711, 1400682, 1748939, 2397422, 2481053, 3497878, 3596133, 4962106, 5246817, 7192266, 7443159, 10493634, 14886318, 106685279, 213370558, 320055837, 640111674]

約数ペア:

[(1, 640111674), (2, 320055837), (3, 213370558), (6, 106685279), (43, 14886318), (61, 10493634), (86, 7443159), (89, 7192266), (122, 5246817), (129, 4962106), (178, 3596133), (183, 3497878), (258, 2481053), (267, 2397422), (366, 1748939), (457, 1400682), (534, 1198711), (914, 700341), (1371, 466894), (2623, 244038), (2742, 233447), (3827, 167262), (5246, 122019), (5429, 117906), (7654, 83631), (7869, 81346), (10858, 58953), (11481, 55754), (15738, 40673), (16287, 39302), (19651, 32574), (22962, 27877)]