21095280

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{353}}^1$

素因数の和:455

約数の個数: 120

約数和(自身を含む): 71901648

約数和(自身を除く): 50806368

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 83, 90, 120, 144, 166, 180, 240, 249, 332, 353, 360, 415, 498, 664, 706, 720, 747, 830, 996, 1059, 1245, 1328, 1412, 1494, 1660, 1765, 1992, 2118, 2490, 2824, 2988, 3177, 3320, 3530, 3735, 3984, 4236, 4980, 5295, 5648, 5976, 6354, 6640, 7060, 7470, 8472, 9960, 10590, 11952, 12708, 14120, 14940, 15885, 16944, 19920, 21180, 25416, 28240, 29299, 29880, 31770, 42360, 50832, 58598, 59760, 63540, 84720, 87897, 117196, 127080, 146495, 175794, 234392, 254160, 263691, 292990, 351588, 439485, 468784, 527382, 585980, 703176, 878970, 1054764, 1171960, 1318455, 1406352, 1757940, 2109528, 2343920, 2636910, 3515880, 4219056, 5273820, 7031760, 10547640, 21095280]

約数ペア:

[(1, 21095280), (2, 10547640), (3, 7031760), (4, 5273820), (5, 4219056), (6, 3515880), (8, 2636910), (9, 2343920), (10, 2109528), (12, 1757940), (15, 1406352), (16, 1318455), (18, 1171960), (20, 1054764), (24, 878970), (30, 703176), (36, 585980), (40, 527382), (45, 468784), (48, 439485), (60, 351588), (72, 292990), (80, 263691), (83, 254160), (90, 234392), (120, 175794), (144, 146495), (166, 127080), (180, 117196), (240, 87897), (249, 84720), (332, 63540), (353, 59760), (360, 58598), (415, 50832), (498, 42360), (664, 31770), (706, 29880), (720, 29299), (747, 28240), (830, 25416), (996, 21180), (1059, 19920), (1245, 16944), (1328, 15885), (1412, 14940), (1494, 14120), (1660, 12708), (1765, 11952), (1992, 10590), (2118, 9960), (2490, 8472), (2824, 7470), (2988, 7060), (3177, 6640), (3320, 6354), (3530, 5976), (3735, 5648), (3984, 5295), (4236, 4980)]