19772240

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2777}}^1$

素因数の和:2879

約数の個数: 40

約数和(自身を含む): 46503720

約数和(自身を除く): 26731480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2777, 3560, 5554, 7120, 11108, 13885, 22216, 27770, 44432, 55540, 111080, 222160, 247153, 494306, 988612, 1235765, 1977224, 2471530, 3954448, 4943060, 9886120, 19772240]

約数ペア:

[(1, 19772240), (2, 9886120), (4, 4943060), (5, 3954448), (8, 2471530), (10, 1977224), (16, 1235765), (20, 988612), (40, 494306), (80, 247153), (89, 222160), (178, 111080), (356, 55540), (445, 44432), (712, 27770), (890, 22216), (1424, 13885), (1780, 11108), (2777, 7120), (3560, 5554)]