258991360

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1$

素因数の和:220

約数の個数: 144

約数和(自身を含む): 656957952

約数和(自身を除く): 397966592

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 61, 62, 64, 80, 107, 122, 124, 128, 155, 160, 214, 244, 248, 256, 305, 310, 320, 428, 488, 496, 535, 610, 620, 640, 856, 976, 992, 1070, 1220, 1240, 1280, 1712, 1891, 1952, 1984, 2140, 2440, 2480, 3317, 3424, 3782, 3904, 3968, 4280, 4880, 4960, 6527, 6634, 6848, 7564, 7808, 7936, 8560, 9455, 9760, 9920, 13054, 13268, 13696, 15128, 15616, 16585, 17120, 18910, 19520, 19840, 26108, 26536, 27392, 30256, 32635, 33170, 34240, 37820, 39040, 39680, 52216, 53072, 60512, 65270, 66340, 68480, 75640, 78080, 104432, 106144, 121024, 130540, 132680, 136960, 151280, 202337, 208864, 212288, 242048, 261080, 265360, 302560, 404674, 417728, 424576, 484096, 522160, 530720, 605120, 809348, 835456, 849152, 1011685, 1044320, 1061440, 1210240, 1618696, 1670912, 2023370, 2088640, 2122880, 2420480, 3237392, 4046740, 4177280, 4245760, 6474784, 8093480, 8354560, 12949568, 16186960, 25899136, 32373920, 51798272, 64747840, 129495680, 258991360]

約数ペア:

[(1, 258991360), (2, 129495680), (4, 64747840), (5, 51798272), (8, 32373920), (10, 25899136), (16, 16186960), (20, 12949568), (31, 8354560), (32, 8093480), (40, 6474784), (61, 4245760), (62, 4177280), (64, 4046740), (80, 3237392), (107, 2420480), (122, 2122880), (124, 2088640), (128, 2023370), (155, 1670912), (160, 1618696), (214, 1210240), (244, 1061440), (248, 1044320), (256, 1011685), (305, 849152), (310, 835456), (320, 809348), (428, 605120), (488, 530720), (496, 522160), (535, 484096), (610, 424576), (620, 417728), (640, 404674), (856, 302560), (976, 265360), (992, 261080), (1070, 242048), (1220, 212288), (1240, 208864), (1280, 202337), (1712, 151280), (1891, 136960), (1952, 132680), (1984, 130540), (2140, 121024), (2440, 106144), (2480, 104432), (3317, 78080), (3424, 75640), (3782, 68480), (3904, 66340), (3968, 65270), (4280, 60512), (4880, 53072), (4960, 52216), (6527, 39680), (6634, 39040), (6848, 37820), (7564, 34240), (7808, 33170), (7936, 32635), (8560, 30256), (9455, 27392), (9760, 26536), (9920, 26108), (13054, 19840), (13268, 19520), (13696, 18910), (15128, 17120), (15616, 16585)]