20461180

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{199}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 44452800

約数和(自身を除く): 23991620

約数列:

[1, 2, 4, 5, 10, 20, 53, 97, 106, 194, 199, 212, 265, 388, 398, 485, 530, 796, 970, 995, 1060, 1940, 1990, 3980, 5141, 10282, 10547, 19303, 20564, 21094, 25705, 38606, 42188, 51410, 52735, 77212, 96515, 102820, 105470, 193030, 210940, 386060, 1023059, 2046118, 4092236, 5115295, 10230590, 20461180]

約数ペア:

[(1, 20461180), (2, 10230590), (4, 5115295), (5, 4092236), (10, 2046118), (20, 1023059), (53, 386060), (97, 210940), (106, 193030), (194, 105470), (199, 102820), (212, 96515), (265, 77212), (388, 52735), (398, 51410), (485, 42188), (530, 38606), (796, 25705), (970, 21094), (995, 20564), (1060, 19303), (1940, 10547), (1990, 10282), (3980, 5141)]