81261480

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1229}}^1$

素因数の和:1291

約数の個数: 128

約数和(自身を含む): 265680000

約数和(自身を除く): 184418520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 29, 30, 38, 40, 57, 58, 60, 76, 87, 95, 114, 116, 120, 145, 152, 174, 190, 228, 232, 285, 290, 348, 380, 435, 456, 551, 570, 580, 696, 760, 870, 1102, 1140, 1160, 1229, 1653, 1740, 2204, 2280, 2458, 2755, 3306, 3480, 3687, 4408, 4916, 5510, 6145, 6612, 7374, 8265, 9832, 11020, 12290, 13224, 14748, 16530, 18435, 22040, 23351, 24580, 29496, 33060, 35641, 36870, 46702, 49160, 66120, 70053, 71282, 73740, 93404, 106923, 116755, 140106, 142564, 147480, 178205, 186808, 213846, 233510, 280212, 285128, 350265, 356410, 427692, 467020, 534615, 560424, 677179, 700530, 712820, 855384, 934040, 1069230, 1354358, 1401060, 1425640, 2031537, 2138460, 2708716, 2802120, 3385895, 4063074, 4276920, 5417432, 6771790, 8126148, 10157685, 13543580, 16252296, 20315370, 27087160, 40630740, 81261480]

約数ペア:

[(1, 81261480), (2, 40630740), (3, 27087160), (4, 20315370), (5, 16252296), (6, 13543580), (8, 10157685), (10, 8126148), (12, 6771790), (15, 5417432), (19, 4276920), (20, 4063074), (24, 3385895), (29, 2802120), (30, 2708716), (38, 2138460), (40, 2031537), (57, 1425640), (58, 1401060), (60, 1354358), (76, 1069230), (87, 934040), (95, 855384), (114, 712820), (116, 700530), (120, 677179), (145, 560424), (152, 534615), (174, 467020), (190, 427692), (228, 356410), (232, 350265), (285, 285128), (290, 280212), (348, 233510), (380, 213846), (435, 186808), (456, 178205), (551, 147480), (570, 142564), (580, 140106), (696, 116755), (760, 106923), (870, 93404), (1102, 73740), (1140, 71282), (1160, 70053), (1229, 66120), (1653, 49160), (1740, 46702), (2204, 36870), (2280, 35641), (2458, 33060), (2755, 29496), (3306, 24580), (3480, 23351), (3687, 22040), (4408, 18435), (4916, 16530), (5510, 14748), (6145, 13224), (6612, 12290), (7374, 11020), (8265, 9832)]