256787440

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{5039}}^1$

素因数の和:5079

約数の個数: 120

約数和(自身を含む): 748077120

約数和(自身を除く): 491289680

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 49, 52, 56, 65, 70, 80, 91, 98, 104, 112, 130, 140, 182, 196, 208, 245, 260, 280, 364, 392, 455, 490, 520, 560, 637, 728, 784, 910, 980, 1040, 1274, 1456, 1820, 1960, 2548, 3185, 3640, 3920, 5039, 5096, 6370, 7280, 10078, 10192, 12740, 20156, 25195, 25480, 35273, 40312, 50390, 50960, 65507, 70546, 80624, 100780, 131014, 141092, 176365, 201560, 246911, 262028, 282184, 327535, 352730, 403120, 458549, 493822, 524056, 564368, 655070, 705460, 917098, 987644, 1048112, 1234555, 1310140, 1410920, 1834196, 1975288, 2292745, 2469110, 2620280, 2821840, 3209843, 3668392, 3950576, 4585490, 4938220, 5240560, 6419686, 7336784, 9170980, 9876440, 12839372, 16049215, 18341960, 19752880, 25678744, 32098430, 36683920, 51357488, 64196860, 128393720, 256787440]

約数ペア:

[(1, 256787440), (2, 128393720), (4, 64196860), (5, 51357488), (7, 36683920), (8, 32098430), (10, 25678744), (13, 19752880), (14, 18341960), (16, 16049215), (20, 12839372), (26, 9876440), (28, 9170980), (35, 7336784), (40, 6419686), (49, 5240560), (52, 4938220), (56, 4585490), (65, 3950576), (70, 3668392), (80, 3209843), (91, 2821840), (98, 2620280), (104, 2469110), (112, 2292745), (130, 1975288), (140, 1834196), (182, 1410920), (196, 1310140), (208, 1234555), (245, 1048112), (260, 987644), (280, 917098), (364, 705460), (392, 655070), (455, 564368), (490, 524056), (520, 493822), (560, 458549), (637, 403120), (728, 352730), (784, 327535), (910, 282184), (980, 262028), (1040, 246911), (1274, 201560), (1456, 176365), (1820, 141092), (1960, 131014), (2548, 100780), (3185, 80624), (3640, 70546), (3920, 65507), (5039, 50960), (5096, 50390), (6370, 40312), (7280, 35273), (10078, 25480), (10192, 25195), (12740, 20156)]