20304520

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4657}}^1$

素因数の和:4777

約数の個数: 32

約数和(自身を含む): 46114200

約数和(自身を除く): 25809680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4657, 9314, 18628, 23285, 37256, 46570, 93140, 186280, 507613, 1015226, 2030452, 2538065, 4060904, 5076130, 10152260, 20304520]

約数ペア:

[(1, 20304520), (2, 10152260), (4, 5076130), (5, 4060904), (8, 2538065), (10, 2030452), (20, 1015226), (40, 507613), (109, 186280), (218, 93140), (436, 46570), (545, 37256), (872, 23285), (1090, 18628), (2180, 9314), (4360, 4657)]