21513970

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{1051}}^1$

素因数の和:1170

約数の個数: 32

約数和(自身を含む): 40901760

約数和(自身を除く): 19387790

約数列:

[1, 2, 5, 10, 23, 46, 89, 115, 178, 230, 445, 890, 1051, 2047, 2102, 4094, 5255, 10235, 10510, 20470, 24173, 48346, 93539, 120865, 187078, 241730, 467695, 935390, 2151397, 4302794, 10756985, 21513970]

約数ペア:

[(1, 21513970), (2, 10756985), (5, 4302794), (10, 2151397), (23, 935390), (46, 467695), (89, 241730), (115, 187078), (178, 120865), (230, 93539), (445, 48346), (890, 24173), (1051, 20470), (2047, 10510), (2102, 10235), (4094, 5255)]