28391540

素因数分解:

$2^2\times 5^1\times {\mathrm{347}}^1\times {\mathrm{4091}}^1$

素因数の和:4447

約数の個数: 24

約数和(自身を含む): 59808672

約数和(自身を除く): 31417132

約数列:

[1, 2, 4, 5, 10, 20, 347, 694, 1388, 1735, 3470, 4091, 6940, 8182, 16364, 20455, 40910, 81820, 1419577, 2839154, 5678308, 7097885, 14195770, 28391540]

約数ペア:

[(1, 28391540), (2, 14195770), (4, 7097885), (5, 5678308), (10, 2839154), (20, 1419577), (347, 81820), (694, 40910), (1388, 20455), (1735, 16364), (3470, 8182), (4091, 6940)]