90489080

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{205657}}^1$

素因数の和:205679

約数の個数: 32

約数和(自身を含む): 222110640

約数和(自身を除く): 131621560

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 205657, 411314, 822628, 1028285, 1645256, 2056570, 2262227, 4113140, 4524454, 8226280, 9048908, 11311135, 18097816, 22622270, 45244540, 90489080]

約数ペア:

[(1, 90489080), (2, 45244540), (4, 22622270), (5, 18097816), (8, 11311135), (10, 9048908), (11, 8226280), (20, 4524454), (22, 4113140), (40, 2262227), (44, 2056570), (55, 1645256), (88, 1028285), (110, 822628), (220, 411314), (440, 205657)]