81204560

素因数分解:

$2^4\times 5^1\times {\mathrm{1015057}}^1$

素因数の和:1015070

約数の個数: 20

約数和(自身を含む): 188800788

約数和(自身を除く): 107596228

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1015057, 2030114, 4060228, 5075285, 8120456, 10150570, 16240912, 20301140, 40602280, 81204560]

約数ペア:

[(1, 81204560), (2, 40602280), (4, 20301140), (5, 16240912), (8, 10150570), (10, 8120456), (16, 5075285), (20, 4060228), (40, 2030114), (80, 1015057)]