81541820

素因数分解:

$2^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{23567}}^1$

素因数の和:23749

約数の個数: 24

約数和(自身を含む): 172234944

約数和(自身を除く): 90693124

約数列:

[1, 2, 4, 5, 10, 20, 173, 346, 692, 865, 1730, 3460, 23567, 47134, 94268, 117835, 235670, 471340, 4077091, 8154182, 16308364, 20385455, 40770910, 81541820]

約数ペア:

[(1, 81541820), (2, 40770910), (4, 20385455), (5, 16308364), (10, 8154182), (20, 4077091), (173, 471340), (346, 235670), (692, 117835), (865, 94268), (1730, 47134), (3460, 23567)]