20418615

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:110

約数の個数: 128

約数和(自身を含む): 46448640

約数和(自身を除く): 26030025

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 27, 31, 35, 41, 45, 51, 63, 85, 93, 105, 119, 123, 135, 153, 155, 189, 205, 217, 255, 279, 287, 315, 357, 369, 459, 465, 527, 595, 615, 651, 697, 765, 837, 861, 945, 1071, 1085, 1107, 1271, 1395, 1435, 1581, 1785, 1845, 1953, 2091, 2295, 2583, 2635, 3213, 3255, 3485, 3689, 3813, 4185, 4305, 4743, 4879, 5355, 5535, 5859, 6273, 6355, 7749, 7905, 8897, 9765, 10455, 11067, 11439, 12915, 14229, 14637, 16065, 18445, 18819, 19065, 21607, 23715, 24395, 26691, 29295, 31365, 33201, 34317, 38745, 43911, 44485, 55335, 57195, 64821, 71145, 73185, 80073, 94095, 99603, 108035, 131733, 133455, 151249, 166005, 171585, 194463, 219555, 240219, 324105, 400365, 453747, 498015, 583389, 658665, 756245, 972315, 1201095, 1361241, 2268735, 2916945, 4083723, 6806205, 20418615]

約数ペア:

[(1, 20418615), (3, 6806205), (5, 4083723), (7, 2916945), (9, 2268735), (15, 1361241), (17, 1201095), (21, 972315), (27, 756245), (31, 658665), (35, 583389), (41, 498015), (45, 453747), (51, 400365), (63, 324105), (85, 240219), (93, 219555), (105, 194463), (119, 171585), (123, 166005), (135, 151249), (153, 133455), (155, 131733), (189, 108035), (205, 99603), (217, 94095), (255, 80073), (279, 73185), (287, 71145), (315, 64821), (357, 57195), (369, 55335), (459, 44485), (465, 43911), (527, 38745), (595, 34317), (615, 33201), (651, 31365), (697, 29295), (765, 26691), (837, 24395), (861, 23715), (945, 21607), (1071, 19065), (1085, 18819), (1107, 18445), (1271, 16065), (1395, 14637), (1435, 14229), (1581, 12915), (1785, 11439), (1845, 11067), (1953, 10455), (2091, 9765), (2295, 8897), (2583, 7905), (2635, 7749), (3213, 6355), (3255, 6273), (3485, 5859), (3689, 5535), (3813, 5355), (4185, 4879), (4305, 4743)]