20897480

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4793}}^1$

素因数の和:4913

約数の個数: 32

約数和(自身を含む): 47460600

約数和(自身を除く): 26563120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4793, 9586, 19172, 23965, 38344, 47930, 95860, 191720, 522437, 1044874, 2089748, 2612185, 4179496, 5224370, 10448740, 20897480]

約数ペア:

[(1, 20897480), (2, 10448740), (4, 5224370), (5, 4179496), (8, 2612185), (10, 2089748), (20, 1044874), (40, 522437), (109, 191720), (218, 95860), (436, 47930), (545, 38344), (872, 23965), (1090, 19172), (2180, 9586), (4360, 4793)]