21900120

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{353}}^1$

素因数の和:425

約数の個数: 128

約数和(自身を含む): 73405440

約数和(自身を除く): 51505320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 47, 55, 60, 66, 88, 94, 110, 120, 132, 141, 165, 188, 220, 235, 264, 282, 330, 353, 376, 440, 470, 517, 564, 660, 705, 706, 940, 1034, 1059, 1128, 1320, 1410, 1412, 1551, 1765, 1880, 2068, 2118, 2585, 2820, 2824, 3102, 3530, 3883, 4136, 4236, 5170, 5295, 5640, 6204, 7060, 7755, 7766, 8472, 10340, 10590, 11649, 12408, 14120, 15510, 15532, 16591, 19415, 20680, 21180, 23298, 31020, 31064, 33182, 38830, 42360, 46596, 49773, 58245, 62040, 66364, 77660, 82955, 93192, 99546, 116490, 132728, 155320, 165910, 182501, 199092, 232980, 248865, 331820, 365002, 398184, 465960, 497730, 547503, 663640, 730004, 912505, 995460, 1095006, 1460008, 1825010, 1990920, 2190012, 2737515, 3650020, 4380024, 5475030, 7300040, 10950060, 21900120]

約数ペア:

[(1, 21900120), (2, 10950060), (3, 7300040), (4, 5475030), (5, 4380024), (6, 3650020), (8, 2737515), (10, 2190012), (11, 1990920), (12, 1825010), (15, 1460008), (20, 1095006), (22, 995460), (24, 912505), (30, 730004), (33, 663640), (40, 547503), (44, 497730), (47, 465960), (55, 398184), (60, 365002), (66, 331820), (88, 248865), (94, 232980), (110, 199092), (120, 182501), (132, 165910), (141, 155320), (165, 132728), (188, 116490), (220, 99546), (235, 93192), (264, 82955), (282, 77660), (330, 66364), (353, 62040), (376, 58245), (440, 49773), (470, 46596), (517, 42360), (564, 38830), (660, 33182), (705, 31064), (706, 31020), (940, 23298), (1034, 21180), (1059, 20680), (1128, 19415), (1320, 16591), (1410, 15532), (1412, 15510), (1551, 14120), (1765, 12408), (1880, 11649), (2068, 10590), (2118, 10340), (2585, 8472), (2820, 7766), (2824, 7755), (3102, 7060), (3530, 6204), (3883, 5640), (4136, 5295), (4236, 5170)]