81909140

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{37573}}^1$

素因数の和:37691

約数の個数: 24

約数和(自身を含む): 173591880

約数和(自身を除く): 91682740

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 37573, 75146, 150292, 187865, 375730, 751460, 4095457, 8190914, 16381828, 20477285, 40954570, 81909140]

約数ペア:

[(1, 81909140), (2, 40954570), (4, 20477285), (5, 16381828), (10, 8190914), (20, 4095457), (109, 751460), (218, 375730), (436, 187865), (545, 150292), (1090, 75146), (2180, 37573)]