20324560

素因数分解:

$2^4\times 5^1\times {\mathrm{239}}^1\times {\mathrm{1063}}^1$

素因数の和:1315

約数の個数: 40

約数和(自身を含む): 47496960

約数和(自身を除く): 27172400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 239, 478, 956, 1063, 1195, 1912, 2126, 2390, 3824, 4252, 4780, 5315, 8504, 9560, 10630, 17008, 19120, 21260, 42520, 85040, 254057, 508114, 1016228, 1270285, 2032456, 2540570, 4064912, 5081140, 10162280, 20324560]

約数ペア:

[(1, 20324560), (2, 10162280), (4, 5081140), (5, 4064912), (8, 2540570), (10, 2032456), (16, 1270285), (20, 1016228), (40, 508114), (80, 254057), (239, 85040), (478, 42520), (956, 21260), (1063, 19120), (1195, 17008), (1912, 10630), (2126, 9560), (2390, 8504), (3824, 5315), (4252, 4780)]