21779667

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1$

素因数の和:193

約数の個数: 72

約数和(自身を含む): 41081040

約数和(自身を除く): 19301373

約数列:

[1, 3, 7, 9, 13, 21, 29, 39, 49, 63, 87, 91, 117, 131, 147, 203, 261, 273, 377, 393, 441, 609, 637, 819, 917, 1131, 1179, 1421, 1703, 1827, 1911, 2639, 2751, 3393, 3799, 4263, 5109, 5733, 6419, 7917, 8253, 11397, 11921, 12789, 15327, 18473, 19257, 23751, 26593, 34191, 35763, 49387, 55419, 57771, 79779, 83447, 107289, 148161, 166257, 186151, 239337, 250341, 345709, 444483, 558453, 751023, 1037127, 1675359, 2419963, 3111381, 7259889, 21779667]

約数ペア:

[(1, 21779667), (3, 7259889), (7, 3111381), (9, 2419963), (13, 1675359), (21, 1037127), (29, 751023), (39, 558453), (49, 444483), (63, 345709), (87, 250341), (91, 239337), (117, 186151), (131, 166257), (147, 148161), (203, 107289), (261, 83447), (273, 79779), (377, 57771), (393, 55419), (441, 49387), (609, 35763), (637, 34191), (819, 26593), (917, 23751), (1131, 19257), (1179, 18473), (1421, 15327), (1703, 12789), (1827, 11921), (1911, 11397), (2639, 8253), (2751, 7917), (3393, 6419), (3799, 5733), (4263, 5109)]