21582729

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{197}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 37559808

約数和(自身を除く): 15977079

約数列:

[1, 3, 7, 9, 21, 37, 47, 63, 111, 141, 197, 259, 329, 333, 423, 591, 777, 987, 1379, 1739, 1773, 2331, 2961, 4137, 5217, 7289, 9259, 12173, 12411, 15651, 21867, 27777, 36519, 51023, 64813, 65601, 83331, 109557, 153069, 194439, 342583, 459207, 583317, 1027749, 2398081, 3083247, 7194243, 21582729]

約数ペア:

[(1, 21582729), (3, 7194243), (7, 3083247), (9, 2398081), (21, 1027749), (37, 583317), (47, 459207), (63, 342583), (111, 194439), (141, 153069), (197, 109557), (259, 83331), (329, 65601), (333, 64813), (423, 51023), (591, 36519), (777, 27777), (987, 21867), (1379, 15651), (1739, 12411), (1773, 12173), (2331, 9259), (2961, 7289), (4137, 5217)]