31531520

素因数分解:

$2^9\times 5^1\times {\mathrm{109}}^1\times {\mathrm{113}}^1$

素因数の和:245

約数の個数: 80

約数和(自身を含む): 76970520

約数和(自身を除く): 45439000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 109, 113, 128, 160, 218, 226, 256, 320, 436, 452, 512, 545, 565, 640, 872, 904, 1090, 1130, 1280, 1744, 1808, 2180, 2260, 2560, 3488, 3616, 4360, 4520, 6976, 7232, 8720, 9040, 12317, 13952, 14464, 17440, 18080, 24634, 27904, 28928, 34880, 36160, 49268, 55808, 57856, 61585, 69760, 72320, 98536, 123170, 139520, 144640, 197072, 246340, 279040, 289280, 394144, 492680, 788288, 985360, 1576576, 1970720, 3153152, 3941440, 6306304, 7882880, 15765760, 31531520]

約数ペア:

[(1, 31531520), (2, 15765760), (4, 7882880), (5, 6306304), (8, 3941440), (10, 3153152), (16, 1970720), (20, 1576576), (32, 985360), (40, 788288), (64, 492680), (80, 394144), (109, 289280), (113, 279040), (128, 246340), (160, 197072), (218, 144640), (226, 139520), (256, 123170), (320, 98536), (436, 72320), (452, 69760), (512, 61585), (545, 57856), (565, 55808), (640, 49268), (872, 36160), (904, 34880), (1090, 28928), (1130, 27904), (1280, 24634), (1744, 18080), (1808, 17440), (2180, 14464), (2260, 13952), (2560, 12317), (3488, 9040), (3616, 8720), (4360, 7232), (4520, 6976)]