20855140

素因数分解:

$2^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{4363}}^1$

素因数の和:4611

約数の個数: 24

約数和(自身を含む): 43989120

約数和(自身を除く): 23133980

約数列:

[1, 2, 4, 5, 10, 20, 239, 478, 956, 1195, 2390, 4363, 4780, 8726, 17452, 21815, 43630, 87260, 1042757, 2085514, 4171028, 5213785, 10427570, 20855140]

約数ペア:

[(1, 20855140), (2, 10427570), (4, 5213785), (5, 4171028), (10, 2085514), (20, 1042757), (239, 87260), (478, 43630), (956, 21815), (1195, 17452), (2390, 8726), (4363, 4780)]