28211440

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{139}}^1$

素因数の和:254

約数の個数: 80

約数和(自身を含む): 68745600

約数和(自身を除く): 40534160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 59, 80, 86, 118, 139, 172, 215, 236, 278, 295, 344, 430, 472, 556, 590, 688, 695, 860, 944, 1112, 1180, 1390, 1720, 2224, 2360, 2537, 2780, 3440, 4720, 5074, 5560, 5977, 8201, 10148, 11120, 11954, 12685, 16402, 20296, 23908, 25370, 29885, 32804, 40592, 41005, 47816, 50740, 59770, 65608, 82010, 95632, 101480, 119540, 131216, 164020, 202960, 239080, 328040, 352643, 478160, 656080, 705286, 1410572, 1763215, 2821144, 3526430, 5642288, 7052860, 14105720, 28211440]

約数ペア:

[(1, 28211440), (2, 14105720), (4, 7052860), (5, 5642288), (8, 3526430), (10, 2821144), (16, 1763215), (20, 1410572), (40, 705286), (43, 656080), (59, 478160), (80, 352643), (86, 328040), (118, 239080), (139, 202960), (172, 164020), (215, 131216), (236, 119540), (278, 101480), (295, 95632), (344, 82010), (430, 65608), (472, 59770), (556, 50740), (590, 47816), (688, 41005), (695, 40592), (860, 32804), (944, 29885), (1112, 25370), (1180, 23908), (1390, 20296), (1720, 16402), (2224, 12685), (2360, 11954), (2537, 11120), (2780, 10148), (3440, 8201), (4720, 5977), (5074, 5560)]