15784720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{397}}^1$

素因数の和:488

約数の個数: 80

約数和(自身を含む): 42640128

約数和(自身を除く): 26855408

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 71, 80, 112, 140, 142, 280, 284, 355, 397, 497, 560, 568, 710, 794, 994, 1136, 1420, 1588, 1985, 1988, 2485, 2779, 2840, 3176, 3970, 3976, 4970, 5558, 5680, 6352, 7940, 7952, 9940, 11116, 13895, 15880, 19880, 22232, 27790, 28187, 31760, 39760, 44464, 55580, 56374, 111160, 112748, 140935, 197309, 222320, 225496, 281870, 394618, 450992, 563740, 789236, 986545, 1127480, 1578472, 1973090, 2254960, 3156944, 3946180, 7892360, 15784720]

約数ペア:

[(1, 15784720), (2, 7892360), (4, 3946180), (5, 3156944), (7, 2254960), (8, 1973090), (10, 1578472), (14, 1127480), (16, 986545), (20, 789236), (28, 563740), (35, 450992), (40, 394618), (56, 281870), (70, 225496), (71, 222320), (80, 197309), (112, 140935), (140, 112748), (142, 111160), (280, 56374), (284, 55580), (355, 44464), (397, 39760), (497, 31760), (560, 28187), (568, 27790), (710, 22232), (794, 19880), (994, 15880), (1136, 13895), (1420, 11116), (1588, 9940), (1985, 7952), (1988, 7940), (2485, 6352), (2779, 5680), (2840, 5558), (3176, 4970), (3970, 3976)]