21538235

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^2\times {\mathrm{479}}^1$

素因数の和:547

約数の個数: 24

約数和(自身を含む): 28667520

約数和(自身を除く): 7129285

約数列:

[1, 5, 17, 23, 85, 115, 391, 479, 529, 1955, 2395, 2645, 8143, 8993, 11017, 40715, 44965, 55085, 187289, 253391, 936445, 1266955, 4307647, 21538235]

約数ペア:

[(1, 21538235), (5, 4307647), (17, 1266955), (23, 936445), (85, 253391), (115, 187289), (391, 55085), (479, 44965), (529, 40715), (1955, 11017), (2395, 8993), (2645, 8143)]