21550347

素因数分解:

$3^3\times 7^3\times {\mathrm{13}}^1\times {\mathrm{179}}^1$

素因数の和:222

約数の個数: 64

約数和(自身を含む): 40320000

約数和(自身を除く): 18769653

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 49, 63, 91, 117, 147, 179, 189, 273, 343, 351, 441, 537, 637, 819, 1029, 1253, 1323, 1611, 1911, 2327, 2457, 3087, 3759, 4459, 4833, 5733, 6981, 8771, 9261, 11277, 13377, 16289, 17199, 20943, 26313, 33831, 40131, 48867, 61397, 62829, 78939, 114023, 120393, 146601, 184191, 236817, 342069, 439803, 552573, 798161, 1026207, 1657719, 2394483, 3078621, 7183449, 21550347]

約数ペア:

[(1, 21550347), (3, 7183449), (7, 3078621), (9, 2394483), (13, 1657719), (21, 1026207), (27, 798161), (39, 552573), (49, 439803), (63, 342069), (91, 236817), (117, 184191), (147, 146601), (179, 120393), (189, 114023), (273, 78939), (343, 62829), (351, 61397), (441, 48867), (537, 40131), (637, 33831), (819, 26313), (1029, 20943), (1253, 17199), (1323, 16289), (1611, 13377), (1911, 11277), (2327, 9261), (2457, 8771), (3087, 6981), (3759, 5733), (4459, 4833)]