20408590

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{997}}^1$

素因数の和:1116

約数の個数: 32

約数和(自身を含む): 38802240

約数和(自身を除く): 18393650

約数列:

[1, 2, 5, 10, 23, 46, 89, 115, 178, 230, 445, 890, 997, 1994, 2047, 4094, 4985, 9970, 10235, 20470, 22931, 45862, 88733, 114655, 177466, 229310, 443665, 887330, 2040859, 4081718, 10204295, 20408590]

約数ペア:

[(1, 20408590), (2, 10204295), (5, 4081718), (10, 2040859), (23, 887330), (46, 443665), (89, 229310), (115, 177466), (178, 114655), (230, 88733), (445, 45862), (890, 22931), (997, 20470), (1994, 10235), (2047, 9970), (4094, 4985)]