21454983

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:149

約数の個数: 64

約数和(自身を含む): 37324800

約数和(自身を除く): 15869817

約数列:

[1, 3, 9, 11, 27, 29, 33, 47, 53, 87, 99, 141, 159, 261, 297, 319, 423, 477, 517, 583, 783, 957, 1269, 1363, 1431, 1537, 1551, 1749, 2491, 2871, 4089, 4611, 4653, 5247, 7473, 8613, 12267, 13833, 13959, 14993, 15741, 16907, 22419, 27401, 36801, 41499, 44979, 50721, 67257, 72239, 82203, 134937, 152163, 216717, 246609, 404811, 456489, 650151, 739827, 794629, 1950453, 2383887, 7151661, 21454983]

約数ペア:

[(1, 21454983), (3, 7151661), (9, 2383887), (11, 1950453), (27, 794629), (29, 739827), (33, 650151), (47, 456489), (53, 404811), (87, 246609), (99, 216717), (141, 152163), (159, 134937), (261, 82203), (297, 72239), (319, 67257), (423, 50721), (477, 44979), (517, 41499), (583, 36801), (783, 27401), (957, 22419), (1269, 16907), (1363, 15741), (1431, 14993), (1537, 13959), (1551, 13833), (1749, 12267), (2491, 8613), (2871, 7473), (4089, 5247), (4611, 4653)]