20749492040

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1\times {\mathrm{70223}}^1$

素因数の和:70406

約数の個数: 64

約数和(自身を含む): 47780409600

約数和(自身を除く): 27030917560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 89, 166, 178, 332, 356, 415, 445, 664, 712, 830, 890, 1660, 1780, 3320, 3560, 7387, 14774, 29548, 36935, 59096, 70223, 73870, 140446, 147740, 280892, 295480, 351115, 561784, 702230, 1404460, 2808920, 5828509, 6249847, 11657018, 12499694, 23314036, 24999388, 29142545, 31249235, 46628072, 49998776, 58285090, 62498470, 116570180, 124996940, 233140360, 249993880, 518737301, 1037474602, 2074949204, 2593686505, 4149898408, 5187373010, 10374746020, 20749492040]

約数ペア:

[(1, 20749492040), (2, 10374746020), (4, 5187373010), (5, 4149898408), (8, 2593686505), (10, 2074949204), (20, 1037474602), (40, 518737301), (83, 249993880), (89, 233140360), (166, 124996940), (178, 116570180), (332, 62498470), (356, 58285090), (415, 49998776), (445, 46628072), (664, 31249235), (712, 29142545), (830, 24999388), (890, 23314036), (1660, 12499694), (1780, 11657018), (3320, 6249847), (3560, 5828509), (7387, 2808920), (14774, 1404460), (29548, 702230), (36935, 561784), (59096, 351115), (70223, 295480), (73870, 280892), (140446, 147740)]