19878555

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{367}}^1$

素因数の和:555

約数の個数: 32

約数和(自身を含む): 33490944

約数和(自身を除く): 13612389

約数列:

[1, 3, 5, 15, 23, 69, 115, 157, 345, 367, 471, 785, 1101, 1835, 2355, 3611, 5505, 8441, 10833, 18055, 25323, 42205, 54165, 57619, 126615, 172857, 288095, 864285, 1325237, 3975711, 6626185, 19878555]

約数ペア:

[(1, 19878555), (3, 6626185), (5, 3975711), (15, 1325237), (23, 864285), (69, 288095), (115, 172857), (157, 126615), (345, 57619), (367, 54165), (471, 42205), (785, 25323), (1101, 18055), (1835, 10833), (2355, 8441), (3611, 5505)]