21720258

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{1553}}^1$

素因数の和:1608

約数の個数: 64

約数和(自身を含む): 56689920

約数和(自身を除く): 34969662

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 37, 42, 54, 63, 74, 111, 126, 189, 222, 259, 333, 378, 518, 666, 777, 999, 1553, 1554, 1998, 2331, 3106, 4659, 4662, 6993, 9318, 10871, 13977, 13986, 21742, 27954, 32613, 41931, 57461, 65226, 83862, 97839, 114922, 172383, 195678, 293517, 344766, 402227, 517149, 587034, 804454, 1034298, 1206681, 1551447, 2413362, 3102894, 3620043, 7240086, 10860129, 21720258]

約数ペア:

[(1, 21720258), (2, 10860129), (3, 7240086), (6, 3620043), (7, 3102894), (9, 2413362), (14, 1551447), (18, 1206681), (21, 1034298), (27, 804454), (37, 587034), (42, 517149), (54, 402227), (63, 344766), (74, 293517), (111, 195678), (126, 172383), (189, 114922), (222, 97839), (259, 83862), (333, 65226), (378, 57461), (518, 41931), (666, 32613), (777, 27954), (999, 21742), (1553, 13986), (1554, 13977), (1998, 10871), (2331, 9318), (3106, 6993), (4659, 4662)]