21821319

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1$

素因数の和:118

約数の個数: 80

約数和(自身を含む): 39517632

約数和(自身を除く): 17696313

約数列:

[1, 3, 9, 13, 17, 23, 27, 39, 51, 53, 69, 81, 117, 153, 159, 207, 221, 299, 351, 391, 459, 477, 621, 663, 689, 897, 901, 1053, 1173, 1219, 1377, 1431, 1863, 1989, 2067, 2691, 2703, 3519, 3657, 4293, 5083, 5967, 6201, 8073, 8109, 10557, 10971, 11713, 15249, 15847, 17901, 18603, 20723, 24219, 24327, 31671, 32913, 35139, 45747, 47541, 55809, 62169, 72981, 98739, 105417, 137241, 142623, 186507, 269399, 316251, 411723, 427869, 559521, 808197, 948753, 1283607, 1678563, 2424591, 7273773, 21821319]

約数ペア:

[(1, 21821319), (3, 7273773), (9, 2424591), (13, 1678563), (17, 1283607), (23, 948753), (27, 808197), (39, 559521), (51, 427869), (53, 411723), (69, 316251), (81, 269399), (117, 186507), (153, 142623), (159, 137241), (207, 105417), (221, 98739), (299, 72981), (351, 62169), (391, 55809), (459, 47541), (477, 45747), (621, 35139), (663, 32913), (689, 31671), (897, 24327), (901, 24219), (1053, 20723), (1173, 18603), (1219, 17901), (1377, 15847), (1431, 15249), (1863, 11713), (1989, 10971), (2067, 10557), (2691, 8109), (2703, 8073), (3519, 6201), (3657, 5967), (4293, 5083)]