81458240

素因数分解:

$2^6\times 5^1\times {\mathrm{254557}}^1$

素因数の和:254574

約数の個数: 28

約数和(自身を含む): 193973196

約数和(自身を除く): 112514956

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 254557, 509114, 1018228, 1272785, 2036456, 2545570, 4072912, 5091140, 8145824, 10182280, 16291648, 20364560, 40729120, 81458240]

約数ペア:

[(1, 81458240), (2, 40729120), (4, 20364560), (5, 16291648), (8, 10182280), (10, 8145824), (16, 5091140), (20, 4072912), (32, 2545570), (40, 2036456), (64, 1272785), (80, 1018228), (160, 509114), (320, 254557)]