20761785

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:108

約数の個数: 96

約数和(自身を含む): 42900480

約数和(自身を除く): 22138695

約数列:

[1, 3, 5, 9, 11, 15, 27, 31, 33, 41, 45, 55, 93, 99, 121, 123, 135, 155, 165, 205, 279, 297, 341, 363, 369, 451, 465, 495, 605, 615, 837, 1023, 1089, 1107, 1271, 1353, 1395, 1485, 1705, 1815, 1845, 2255, 3069, 3267, 3751, 3813, 4059, 4185, 4961, 5115, 5445, 5535, 6355, 6765, 9207, 11253, 11439, 12177, 13981, 14883, 15345, 16335, 18755, 19065, 20295, 24805, 33759, 34317, 41943, 44649, 46035, 56265, 57195, 60885, 69905, 74415, 101277, 125829, 133947, 153791, 168795, 171585, 209715, 223245, 377487, 461373, 506385, 629145, 669735, 768955, 1384119, 1887435, 2306865, 4152357, 6920595, 20761785]

約数ペア:

[(1, 20761785), (3, 6920595), (5, 4152357), (9, 2306865), (11, 1887435), (15, 1384119), (27, 768955), (31, 669735), (33, 629145), (41, 506385), (45, 461373), (55, 377487), (93, 223245), (99, 209715), (121, 171585), (123, 168795), (135, 153791), (155, 133947), (165, 125829), (205, 101277), (279, 74415), (297, 69905), (341, 60885), (363, 57195), (369, 56265), (451, 46035), (465, 44649), (495, 41943), (605, 34317), (615, 33759), (837, 24805), (1023, 20295), (1089, 19065), (1107, 18755), (1271, 16335), (1353, 15345), (1395, 14883), (1485, 13981), (1705, 12177), (1815, 11439), (1845, 11253), (2255, 9207), (3069, 6765), (3267, 6355), (3751, 5535), (3813, 5445), (4059, 5115), (4185, 4961)]