12720880

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{8369}}^1$

素因数の和:8401

約数の個数: 40

約数和(自身を含む): 31136400

約数和(自身を除く): 18415520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 8369, 16738, 33476, 41845, 66952, 83690, 133904, 159011, 167380, 318022, 334760, 636044, 669520, 795055, 1272088, 1590110, 2544176, 3180220, 6360440, 12720880]

約数ペア:

[(1, 12720880), (2, 6360440), (4, 3180220), (5, 2544176), (8, 1590110), (10, 1272088), (16, 795055), (19, 669520), (20, 636044), (38, 334760), (40, 318022), (76, 167380), (80, 159011), (95, 133904), (152, 83690), (190, 66952), (304, 41845), (380, 33476), (760, 16738), (1520, 8369)]