21216006

素因数分解:

$2^1\times 3^4\times 7^1\times {\mathrm{53}}^1\times {\mathrm{353}}^1$

素因数の和:427

約数の個数: 80

約数和(自身を含む): 55512864

約数和(自身を除く): 34296858

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 53, 54, 63, 81, 106, 126, 159, 162, 189, 318, 353, 371, 378, 477, 567, 706, 742, 954, 1059, 1113, 1134, 1431, 2118, 2226, 2471, 2862, 3177, 3339, 4293, 4942, 6354, 6678, 7413, 8586, 9531, 10017, 14826, 18709, 19062, 20034, 22239, 28593, 30051, 37418, 44478, 56127, 57186, 60102, 66717, 112254, 130963, 133434, 168381, 200151, 261926, 336762, 392889, 400302, 505143, 785778, 1010286, 1178667, 1515429, 2357334, 3030858, 3536001, 7072002, 10608003, 21216006]

約数ペア:

[(1, 21216006), (2, 10608003), (3, 7072002), (6, 3536001), (7, 3030858), (9, 2357334), (14, 1515429), (18, 1178667), (21, 1010286), (27, 785778), (42, 505143), (53, 400302), (54, 392889), (63, 336762), (81, 261926), (106, 200151), (126, 168381), (159, 133434), (162, 130963), (189, 112254), (318, 66717), (353, 60102), (371, 57186), (378, 56127), (477, 44478), (567, 37418), (706, 30051), (742, 28593), (954, 22239), (1059, 20034), (1113, 19062), (1134, 18709), (1431, 14826), (2118, 10017), (2226, 9531), (2471, 8586), (2862, 7413), (3177, 6678), (3339, 6354), (4293, 4942)]