20393660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{127}}^1$

素因数の和:211

約数の個数: 96

約数和(自身を含む): 52297728

約数和(自身を除く): 31904068

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 37, 62, 70, 74, 124, 127, 140, 148, 155, 185, 217, 254, 259, 310, 370, 434, 508, 518, 620, 635, 740, 868, 889, 1036, 1085, 1147, 1270, 1295, 1778, 2170, 2294, 2540, 2590, 3556, 3937, 4340, 4445, 4588, 4699, 5180, 5735, 7874, 8029, 8890, 9398, 11470, 15748, 16058, 17780, 18796, 19685, 22940, 23495, 27559, 32116, 32893, 39370, 40145, 46990, 55118, 65786, 78740, 80290, 93980, 110236, 131572, 137795, 145669, 160580, 164465, 275590, 291338, 328930, 551180, 582676, 657860, 728345, 1019683, 1456690, 2039366, 2913380, 4078732, 5098415, 10196830, 20393660]

約数ペア:

[(1, 20393660), (2, 10196830), (4, 5098415), (5, 4078732), (7, 2913380), (10, 2039366), (14, 1456690), (20, 1019683), (28, 728345), (31, 657860), (35, 582676), (37, 551180), (62, 328930), (70, 291338), (74, 275590), (124, 164465), (127, 160580), (140, 145669), (148, 137795), (155, 131572), (185, 110236), (217, 93980), (254, 80290), (259, 78740), (310, 65786), (370, 55118), (434, 46990), (508, 40145), (518, 39370), (620, 32893), (635, 32116), (740, 27559), (868, 23495), (889, 22940), (1036, 19685), (1085, 18796), (1147, 17780), (1270, 16058), (1295, 15748), (1778, 11470), (2170, 9398), (2294, 8890), (2540, 8029), (2590, 7874), (3556, 5735), (3937, 5180), (4340, 4699), (4445, 4588)]