20528820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{283}}^1$

素因数の和:342

約数の個数: 144

約数和(自身を含む): 69468672

約数和(自身を除く): 48939852

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 31, 36, 39, 45, 52, 60, 62, 65, 78, 90, 93, 117, 124, 130, 155, 156, 180, 186, 195, 234, 260, 279, 283, 310, 372, 390, 403, 465, 468, 558, 566, 585, 620, 780, 806, 849, 930, 1116, 1132, 1170, 1209, 1395, 1415, 1612, 1698, 1860, 2015, 2340, 2418, 2547, 2790, 2830, 3396, 3627, 3679, 4030, 4245, 4836, 5094, 5580, 5660, 6045, 7254, 7358, 8060, 8490, 8773, 10188, 11037, 12090, 12735, 14508, 14716, 16980, 17546, 18135, 18395, 22074, 24180, 25470, 26319, 33111, 35092, 36270, 36790, 43865, 44148, 50940, 52638, 55185, 66222, 72540, 73580, 78957, 87730, 105276, 110370, 114049, 131595, 132444, 157914, 165555, 175460, 220740, 228098, 263190, 315828, 331110, 342147, 394785, 456196, 526380, 570245, 662220, 684294, 789570, 1026441, 1140490, 1368588, 1579140, 1710735, 2052882, 2280980, 3421470, 4105764, 5132205, 6842940, 10264410, 20528820]

約数ペア:

[(1, 20528820), (2, 10264410), (3, 6842940), (4, 5132205), (5, 4105764), (6, 3421470), (9, 2280980), (10, 2052882), (12, 1710735), (13, 1579140), (15, 1368588), (18, 1140490), (20, 1026441), (26, 789570), (30, 684294), (31, 662220), (36, 570245), (39, 526380), (45, 456196), (52, 394785), (60, 342147), (62, 331110), (65, 315828), (78, 263190), (90, 228098), (93, 220740), (117, 175460), (124, 165555), (130, 157914), (155, 132444), (156, 131595), (180, 114049), (186, 110370), (195, 105276), (234, 87730), (260, 78957), (279, 73580), (283, 72540), (310, 66222), (372, 55185), (390, 52638), (403, 50940), (465, 44148), (468, 43865), (558, 36790), (566, 36270), (585, 35092), (620, 33111), (780, 26319), (806, 25470), (849, 24180), (930, 22074), (1116, 18395), (1132, 18135), (1170, 17546), (1209, 16980), (1395, 14716), (1415, 14508), (1612, 12735), (1698, 12090), (1860, 11037), (2015, 10188), (2340, 8773), (2418, 8490), (2547, 8060), (2790, 7358), (2830, 7254), (3396, 6045), (3627, 5660), (3679, 5580), (4030, 5094), (4245, 4836)]