40807420

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{18719}}^1$

素因数の和:18837

約数の個数: 24

約数和(自身を含む): 86486400

約数和(自身を除く): 45678980

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 18719, 37438, 74876, 93595, 187190, 374380, 2040371, 4080742, 8161484, 10201855, 20403710, 40807420]

約数ペア:

[(1, 40807420), (2, 20403710), (4, 10201855), (5, 8161484), (10, 4080742), (20, 2040371), (109, 374380), (218, 187190), (436, 93595), (545, 74876), (1090, 37438), (2180, 18719)]