991460

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{557}}^1$

素因数の和:655

約数の個数: 24

約数和(自身を含む): 2109240

約数和(自身を除く): 1117780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 557, 890, 1114, 1780, 2228, 2785, 5570, 11140, 49573, 99146, 198292, 247865, 495730, 991460]

約数ペア:

[(1, 991460), (2, 495730), (4, 247865), (5, 198292), (10, 99146), (20, 49573), (89, 11140), (178, 5570), (356, 2785), (445, 2228), (557, 1780), (890, 1114)]