256789960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{12917}}^1$

素因数の和:13006

約数の個数: 64

約数和(自身を含む): 669669120

約数和(自身を除く): 412879160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1420, 1988, 2485, 2840, 3976, 4970, 9940, 12917, 19880, 25834, 51668, 64585, 90419, 103336, 129170, 180838, 258340, 361676, 452095, 516680, 723352, 904190, 917107, 1808380, 1834214, 3616760, 3668428, 4585535, 6419749, 7336856, 9171070, 12839498, 18342140, 25678996, 32098745, 36684280, 51357992, 64197490, 128394980, 256789960]

約数ペア:

[(1, 256789960), (2, 128394980), (4, 64197490), (5, 51357992), (7, 36684280), (8, 32098745), (10, 25678996), (14, 18342140), (20, 12839498), (28, 9171070), (35, 7336856), (40, 6419749), (56, 4585535), (70, 3668428), (71, 3616760), (140, 1834214), (142, 1808380), (280, 917107), (284, 904190), (355, 723352), (497, 516680), (568, 452095), (710, 361676), (994, 258340), (1420, 180838), (1988, 129170), (2485, 103336), (2840, 90419), (3976, 64585), (4970, 51668), (9940, 25834), (12917, 19880)]