21757480

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{241}}^1$

素因数の和:350

約数の個数: 64

約数和(自身を含む): 51313680

約数和(自身を除く): 29556200

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 61, 74, 122, 148, 185, 241, 244, 296, 305, 370, 482, 488, 610, 740, 964, 1205, 1220, 1480, 1928, 2257, 2410, 2440, 4514, 4820, 8917, 9028, 9640, 11285, 14701, 17834, 18056, 22570, 29402, 35668, 44585, 45140, 58804, 71336, 73505, 89170, 90280, 117608, 147010, 178340, 294020, 356680, 543937, 588040, 1087874, 2175748, 2719685, 4351496, 5439370, 10878740, 21757480]

約数ペア:

[(1, 21757480), (2, 10878740), (4, 5439370), (5, 4351496), (8, 2719685), (10, 2175748), (20, 1087874), (37, 588040), (40, 543937), (61, 356680), (74, 294020), (122, 178340), (148, 147010), (185, 117608), (241, 90280), (244, 89170), (296, 73505), (305, 71336), (370, 58804), (482, 45140), (488, 44585), (610, 35668), (740, 29402), (964, 22570), (1205, 18056), (1220, 17834), (1480, 14701), (1928, 11285), (2257, 9640), (2410, 9028), (2440, 8917), (4514, 4820)]