21000514878

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{769}}^1\times {\mathrm{2969}}^1$

素因数の和:3826

約数の個数: 96

約数和(自身を含む): 52799947200

約数和(自身を除く): 31799432322

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 73, 126, 146, 219, 438, 511, 657, 769, 1022, 1314, 1533, 1538, 2307, 2969, 3066, 4599, 4614, 5383, 5938, 6921, 8907, 9198, 10766, 13842, 16149, 17814, 20783, 26721, 32298, 41566, 48447, 53442, 56137, 62349, 96894, 112274, 124698, 168411, 187047, 216737, 336822, 374094, 392959, 433474, 505233, 650211, 785918, 1010466, 1178877, 1300422, 1517159, 1950633, 2283161, 2357754, 3034318, 3536631, 3901266, 4551477, 4566322, 6849483, 7073262, 9102954, 13654431, 13698966, 15982127, 20548449, 27308862, 31964254, 41096898, 47946381, 95892762, 143839143, 166670753, 287678286, 333341506, 500012259, 1000024518, 1166695271, 1500036777, 2333390542, 3000073554, 3500085813, 7000171626, 10500257439, 21000514878]

約数ペア:

[(1, 21000514878), (2, 10500257439), (3, 7000171626), (6, 3500085813), (7, 3000073554), (9, 2333390542), (14, 1500036777), (18, 1166695271), (21, 1000024518), (42, 500012259), (63, 333341506), (73, 287678286), (126, 166670753), (146, 143839143), (219, 95892762), (438, 47946381), (511, 41096898), (657, 31964254), (769, 27308862), (1022, 20548449), (1314, 15982127), (1533, 13698966), (1538, 13654431), (2307, 9102954), (2969, 7073262), (3066, 6849483), (4599, 4566322), (4614, 4551477), (5383, 3901266), (5938, 3536631), (6921, 3034318), (8907, 2357754), (9198, 2283161), (10766, 1950633), (13842, 1517159), (16149, 1300422), (17814, 1178877), (20783, 1010466), (26721, 785918), (32298, 650211), (41566, 505233), (48447, 433474), (53442, 392959), (56137, 374094), (62349, 336822), (96894, 216737), (112274, 187047), (124698, 168411)]