21074823

素因数分解:

$3^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1$

素因数の和:170

約数の個数: 80

約数和(自身を含む): 40888320

約数和(自身を除く): 19813497

約数列:

[1, 3, 7, 9, 11, 21, 27, 31, 33, 63, 77, 81, 93, 99, 109, 189, 217, 231, 279, 297, 327, 341, 567, 651, 693, 763, 837, 891, 981, 1023, 1199, 1953, 2079, 2289, 2387, 2511, 2943, 3069, 3379, 3597, 5859, 6237, 6867, 7161, 8393, 8829, 9207, 10137, 10791, 17577, 20601, 21483, 23653, 25179, 27621, 30411, 32373, 37169, 61803, 64449, 70959, 75537, 91233, 97119, 111507, 193347, 212877, 226611, 260183, 273699, 334521, 638631, 679833, 780549, 1003563, 1915893, 2341647, 3010689, 7024941, 21074823]

約数ペア:

[(1, 21074823), (3, 7024941), (7, 3010689), (9, 2341647), (11, 1915893), (21, 1003563), (27, 780549), (31, 679833), (33, 638631), (63, 334521), (77, 273699), (81, 260183), (93, 226611), (99, 212877), (109, 193347), (189, 111507), (217, 97119), (231, 91233), (279, 75537), (297, 70959), (327, 64449), (341, 61803), (567, 37169), (651, 32373), (693, 30411), (763, 27621), (837, 25179), (891, 23653), (981, 21483), (1023, 20601), (1199, 17577), (1953, 10791), (2079, 10137), (2289, 9207), (2387, 8829), (2511, 8393), (2943, 7161), (3069, 6867), (3379, 6237), (3597, 5859)]