21157038

素因数分解:

$2^1\times 3^7\times 7^1\times {\mathrm{691}}^1$

素因数の和:721

約数の個数: 64

約数和(自身を含む): 54474240

約数和(自身を除く): 33317202

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 81, 126, 162, 189, 243, 378, 486, 567, 691, 729, 1134, 1382, 1458, 1701, 2073, 2187, 3402, 4146, 4374, 4837, 5103, 6219, 9674, 10206, 12438, 14511, 15309, 18657, 29022, 30618, 37314, 43533, 55971, 87066, 111942, 130599, 167913, 261198, 335826, 391797, 503739, 783594, 1007478, 1175391, 1511217, 2350782, 3022434, 3526173, 7052346, 10578519, 21157038]

約数ペア:

[(1, 21157038), (2, 10578519), (3, 7052346), (6, 3526173), (7, 3022434), (9, 2350782), (14, 1511217), (18, 1175391), (21, 1007478), (27, 783594), (42, 503739), (54, 391797), (63, 335826), (81, 261198), (126, 167913), (162, 130599), (189, 111942), (243, 87066), (378, 55971), (486, 43533), (567, 37314), (691, 30618), (729, 29022), (1134, 18657), (1382, 15309), (1458, 14511), (1701, 12438), (2073, 10206), (2187, 9674), (3402, 6219), (4146, 5103), (4374, 4837)]