21199788

素因数分解:

$2^2\times 3^2\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{271}}^1$

素因数の和:375

約数の個数: 72

約数和(自身を含む): 56137536

約数和(自身を除く): 34937748

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 41, 53, 82, 106, 123, 159, 164, 212, 246, 271, 318, 369, 477, 492, 542, 636, 738, 813, 954, 1084, 1476, 1626, 1908, 2173, 2439, 3252, 4346, 4878, 6519, 8692, 9756, 11111, 13038, 14363, 19557, 22222, 26076, 28726, 33333, 39114, 43089, 44444, 57452, 66666, 78228, 86178, 99999, 129267, 133332, 172356, 199998, 258534, 399996, 517068, 588883, 1177766, 1766649, 2355532, 3533298, 5299947, 7066596, 10599894, 21199788]

約数ペア:

[(1, 21199788), (2, 10599894), (3, 7066596), (4, 5299947), (6, 3533298), (9, 2355532), (12, 1766649), (18, 1177766), (36, 588883), (41, 517068), (53, 399996), (82, 258534), (106, 199998), (123, 172356), (159, 133332), (164, 129267), (212, 99999), (246, 86178), (271, 78228), (318, 66666), (369, 57452), (477, 44444), (492, 43089), (542, 39114), (636, 33333), (738, 28726), (813, 26076), (954, 22222), (1084, 19557), (1476, 14363), (1626, 13038), (1908, 11111), (2173, 9756), (2439, 8692), (3252, 6519), (4346, 4878)]