20009425

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^2\times {\mathrm{89}}^1$

素因数の和:162

約数の個数: 36

約数和(自身を含む): 27771660

約数和(自身を除く): 7762235

約数列:

[1, 5, 17, 23, 25, 85, 89, 115, 391, 425, 445, 529, 575, 1513, 1955, 2047, 2225, 2645, 7565, 8993, 9775, 10235, 13225, 34799, 37825, 44965, 47081, 51175, 173995, 224825, 235405, 800377, 869975, 1177025, 4001885, 20009425]

約数ペア:

[(1, 20009425), (5, 4001885), (17, 1177025), (23, 869975), (25, 800377), (85, 235405), (89, 224825), (115, 173995), (391, 51175), (425, 47081), (445, 44965), (529, 37825), (575, 34799), (1513, 13225), (1955, 10235), (2047, 9775), (2225, 8993), (2645, 7565)]