21014745075

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1\times {\mathrm{347}}^1$

素因数の和:674

約数の個数: 144

約数和(自身を含む): 40713394176

約数和(自身を除く): 19698649101

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 71, 75, 85, 153, 213, 223, 225, 255, 347, 355, 425, 639, 669, 765, 1041, 1065, 1115, 1207, 1275, 1735, 1775, 2007, 3123, 3195, 3345, 3621, 3791, 3825, 5205, 5325, 5575, 5899, 6035, 8675, 10035, 10863, 11373, 15615, 15833, 15975, 16725, 17697, 18105, 18955, 24637, 26025, 29495, 30175, 34119, 47499, 50175, 53091, 54315, 56865, 73911, 77381, 78075, 79165, 88485, 90525, 94775, 123185, 142497, 147475, 170595, 221733, 232143, 237495, 265455, 269161, 271575, 284325, 369555, 386905, 395825, 418829, 442425, 615925, 696429, 712485, 807483, 852975, 1108665, 1160715, 1187475, 1256487, 1315477, 1327275, 1345805, 1847775, 1934525, 2094145, 2422449, 3482145, 3562425, 3769461, 3946431, 4037415, 5494051, 5543325, 5803575, 6282435, 6577385, 6729025, 10470725, 11839293, 12112245, 16482153, 17410725, 18847305, 19732155, 20187075, 27470255, 31412175, 32886925, 49446459, 59196465, 60561225, 82410765, 93398867, 94236525, 98660775, 137351275, 247232295, 280196601, 295982325, 412053825, 466994335, 840589803, 1236161475, 1400983005, 2334971675, 4202949015, 7004915025, 21014745075]

約数ペア:

[(1, 21014745075), (3, 7004915025), (5, 4202949015), (9, 2334971675), (15, 1400983005), (17, 1236161475), (25, 840589803), (45, 466994335), (51, 412053825), (71, 295982325), (75, 280196601), (85, 247232295), (153, 137351275), (213, 98660775), (223, 94236525), (225, 93398867), (255, 82410765), (347, 60561225), (355, 59196465), (425, 49446459), (639, 32886925), (669, 31412175), (765, 27470255), (1041, 20187075), (1065, 19732155), (1115, 18847305), (1207, 17410725), (1275, 16482153), (1735, 12112245), (1775, 11839293), (2007, 10470725), (3123, 6729025), (3195, 6577385), (3345, 6282435), (3621, 5803575), (3791, 5543325), (3825, 5494051), (5205, 4037415), (5325, 3946431), (5575, 3769461), (5899, 3562425), (6035, 3482145), (8675, 2422449), (10035, 2094145), (10863, 1934525), (11373, 1847775), (15615, 1345805), (15833, 1327275), (15975, 1315477), (16725, 1256487), (17697, 1187475), (18105, 1160715), (18955, 1108665), (24637, 852975), (26025, 807483), (29495, 712485), (30175, 696429), (34119, 615925), (47499, 442425), (50175, 418829), (53091, 395825), (54315, 386905), (56865, 369555), (73911, 284325), (77381, 271575), (78075, 269161), (79165, 265455), (88485, 237495), (90525, 232143), (94775, 221733), (123185, 170595), (142497, 147475)]