21000507213

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^2\times {\mathrm{199}}^1$

素因数の和:419

約数の個数: 96

約数和(自身を含む): 34855833600

約数和(自身を除く): 13855326387

約数列:

[1, 3, 7, 21, 23, 41, 69, 73, 123, 161, 199, 219, 287, 483, 511, 597, 861, 943, 1393, 1533, 1679, 2829, 2993, 4179, 4577, 5037, 5329, 6601, 8159, 8979, 11753, 13731, 14527, 15987, 19803, 20951, 24477, 32039, 35259, 37303, 43581, 57113, 62853, 68839, 96117, 101689, 111909, 122567, 171339, 187657, 206517, 218489, 305067, 334121, 367701, 481873, 562971, 595607, 655467, 857969, 1002363, 1060471, 1313599, 1445619, 1529423, 1786821, 2338847, 2573907, 3181413, 3940797, 4169249, 4588269, 5025247, 7016541, 7423297, 12507747, 13698961, 15075741, 22269891, 24390833, 35176729, 41096883, 43479311, 73172499, 95892727, 105530187, 130437933, 170735831, 287678181, 304355177, 512207493, 913065531, 1000024153, 3000072459, 7000169071, 21000507213]

約数ペア:

[(1, 21000507213), (3, 7000169071), (7, 3000072459), (21, 1000024153), (23, 913065531), (41, 512207493), (69, 304355177), (73, 287678181), (123, 170735831), (161, 130437933), (199, 105530187), (219, 95892727), (287, 73172499), (483, 43479311), (511, 41096883), (597, 35176729), (861, 24390833), (943, 22269891), (1393, 15075741), (1533, 13698961), (1679, 12507747), (2829, 7423297), (2993, 7016541), (4179, 5025247), (4577, 4588269), (5037, 4169249), (5329, 3940797), (6601, 3181413), (8159, 2573907), (8979, 2338847), (11753, 1786821), (13731, 1529423), (14527, 1445619), (15987, 1313599), (19803, 1060471), (20951, 1002363), (24477, 857969), (32039, 655467), (35259, 595607), (37303, 562971), (43581, 481873), (57113, 367701), (62853, 334121), (68839, 305067), (96117, 218489), (101689, 206517), (111909, 187657), (122567, 171339)]