20821720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27397}}^1$

素因数の和:27427

約数の個数: 32

約数和(自身を含む): 49316400

約数和(自身を除く): 28494680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27397, 54794, 109588, 136985, 219176, 273970, 520543, 547940, 1041086, 1095880, 2082172, 2602715, 4164344, 5205430, 10410860, 20821720]

約数ペア:

[(1, 20821720), (2, 10410860), (4, 5205430), (5, 4164344), (8, 2602715), (10, 2082172), (19, 1095880), (20, 1041086), (38, 547940), (40, 520543), (76, 273970), (95, 219176), (152, 136985), (190, 109588), (380, 54794), (760, 27397)]