18805311

素因数分解:

$3^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:165

約数の個数: 64

約数和(自身を含む): 34099200

約数和(自身を除く): 15293889

約数列:

[1, 3, 7, 9, 21, 27, 29, 47, 63, 73, 87, 141, 189, 203, 219, 261, 329, 423, 511, 609, 657, 783, 987, 1269, 1363, 1533, 1827, 1971, 2117, 2961, 3431, 4089, 4599, 5481, 6351, 8883, 9541, 10293, 12267, 13797, 14819, 19053, 24017, 28623, 30879, 36801, 44457, 57159, 72051, 85869, 92637, 99499, 133371, 216153, 257607, 298497, 400113, 648459, 696493, 895491, 2089479, 2686473, 6268437, 18805311]

約数ペア:

[(1, 18805311), (3, 6268437), (7, 2686473), (9, 2089479), (21, 895491), (27, 696493), (29, 648459), (47, 400113), (63, 298497), (73, 257607), (87, 216153), (141, 133371), (189, 99499), (203, 92637), (219, 85869), (261, 72051), (329, 57159), (423, 44457), (511, 36801), (609, 30879), (657, 28623), (783, 24017), (987, 19053), (1269, 14819), (1363, 13797), (1533, 12267), (1827, 10293), (1971, 9541), (2117, 8883), (2961, 6351), (3431, 5481), (4089, 4599)]