21343640

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{11353}}^1$

素因数の和:11411

約数の個数: 32

約数和(自身を含む): 49049280

約数和(自身を除く): 27705640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 11353, 22706, 45412, 56765, 90824, 113530, 227060, 454120, 533591, 1067182, 2134364, 2667955, 4268728, 5335910, 10671820, 21343640]

約数ペア:

[(1, 21343640), (2, 10671820), (4, 5335910), (5, 4268728), (8, 2667955), (10, 2134364), (20, 1067182), (40, 533591), (47, 454120), (94, 227060), (188, 113530), (235, 90824), (376, 56765), (470, 45412), (940, 22706), (1880, 11353)]