31691120

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{4451}}^1$

素因数の和:4553

約数の個数: 40

約数和(自身を含む): 74526480

約数和(自身を除く): 42835360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560, 4451, 7120, 8902, 17804, 22255, 35608, 44510, 71216, 89020, 178040, 356080, 396139, 792278, 1584556, 1980695, 3169112, 3961390, 6338224, 7922780, 15845560, 31691120]

約数ペア:

[(1, 31691120), (2, 15845560), (4, 7922780), (5, 6338224), (8, 3961390), (10, 3169112), (16, 1980695), (20, 1584556), (40, 792278), (80, 396139), (89, 356080), (178, 178040), (356, 89020), (445, 71216), (712, 44510), (890, 35608), (1424, 22255), (1780, 17804), (3560, 8902), (4451, 7120)]