20904660

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{353}}^1$

素因数の和:422

約数の個数: 144

約数和(自身を含む): 74221056

約数和(自身を除く): 53316396

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 47, 60, 63, 70, 84, 90, 94, 105, 126, 140, 141, 180, 188, 210, 235, 252, 282, 315, 329, 353, 420, 423, 470, 564, 630, 658, 705, 706, 846, 940, 987, 1059, 1260, 1316, 1410, 1412, 1645, 1692, 1765, 1974, 2115, 2118, 2471, 2820, 2961, 3177, 3290, 3530, 3948, 4230, 4236, 4935, 4942, 5295, 5922, 6354, 6580, 7060, 7413, 8460, 9870, 9884, 10590, 11844, 12355, 12708, 14805, 14826, 15885, 16591, 19740, 21180, 22239, 24710, 29610, 29652, 31770, 33182, 37065, 44478, 49420, 49773, 59220, 63540, 66364, 74130, 82955, 88956, 99546, 111195, 116137, 148260, 149319, 165910, 199092, 222390, 232274, 248865, 298638, 331820, 348411, 444780, 464548, 497730, 580685, 597276, 696822, 746595, 995460, 1045233, 1161370, 1393644, 1493190, 1742055, 2090466, 2322740, 2986380, 3484110, 4180932, 5226165, 6968220, 10452330, 20904660]

約数ペア:

[(1, 20904660), (2, 10452330), (3, 6968220), (4, 5226165), (5, 4180932), (6, 3484110), (7, 2986380), (9, 2322740), (10, 2090466), (12, 1742055), (14, 1493190), (15, 1393644), (18, 1161370), (20, 1045233), (21, 995460), (28, 746595), (30, 696822), (35, 597276), (36, 580685), (42, 497730), (45, 464548), (47, 444780), (60, 348411), (63, 331820), (70, 298638), (84, 248865), (90, 232274), (94, 222390), (105, 199092), (126, 165910), (140, 149319), (141, 148260), (180, 116137), (188, 111195), (210, 99546), (235, 88956), (252, 82955), (282, 74130), (315, 66364), (329, 63540), (353, 59220), (420, 49773), (423, 49420), (470, 44478), (564, 37065), (630, 33182), (658, 31770), (705, 29652), (706, 29610), (846, 24710), (940, 22239), (987, 21180), (1059, 19740), (1260, 16591), (1316, 15885), (1410, 14826), (1412, 14805), (1645, 12708), (1692, 12355), (1765, 11844), (1974, 10590), (2115, 9884), (2118, 9870), (2471, 8460), (2820, 7413), (2961, 7060), (3177, 6580), (3290, 6354), (3530, 5922), (3948, 5295), (4230, 4942), (4236, 4935)]