21205885

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{10847}}^1$

素因数の和:10892

約数の個数: 16

約数和(自身を含む): 28118016

約数和(自身を除く): 6912131

約数列:

[1, 5, 17, 23, 85, 115, 391, 1955, 10847, 54235, 184399, 249481, 921995, 1247405, 4241177, 21205885]

約数ペア:

[(1, 21205885), (5, 4241177), (17, 1247405), (23, 921995), (85, 249481), (115, 184399), (391, 54235), (1955, 10847)]