21001365

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1$

素因数の和:88

約数の個数: 144

約数和(自身を含む): 49795200

約数和(自身を除く): 28793835

約数列:

[1, 3, 5, 7, 9, 11, 15, 19, 21, 29, 33, 35, 45, 55, 57, 63, 77, 87, 95, 99, 105, 121, 133, 145, 165, 171, 203, 209, 231, 261, 285, 315, 319, 363, 385, 399, 435, 495, 551, 605, 609, 627, 665, 693, 847, 855, 957, 1015, 1045, 1089, 1155, 1197, 1305, 1463, 1595, 1653, 1815, 1827, 1881, 1995, 2233, 2299, 2541, 2755, 2871, 3045, 3135, 3465, 3509, 3857, 4235, 4389, 4785, 4959, 5445, 5985, 6061, 6699, 6897, 7315, 7623, 8265, 9135, 9405, 10527, 11165, 11495, 11571, 12705, 13167, 14355, 16093, 17545, 18183, 19285, 20097, 20691, 21945, 24563, 24795, 30305, 31581, 33495, 34485, 34713, 38115, 42427, 48279, 52635, 54549, 57855, 65835, 66671, 73689, 80465, 90915, 100485, 103455, 122815, 127281, 144837, 157905, 173565, 200013, 212135, 221067, 241395, 272745, 333355, 368445, 381843, 466697, 600039, 636405, 724185, 1000065, 1105335, 1400091, 1909215, 2333485, 3000195, 4200273, 7000455, 21001365]

約数ペア:

[(1, 21001365), (3, 7000455), (5, 4200273), (7, 3000195), (9, 2333485), (11, 1909215), (15, 1400091), (19, 1105335), (21, 1000065), (29, 724185), (33, 636405), (35, 600039), (45, 466697), (55, 381843), (57, 368445), (63, 333355), (77, 272745), (87, 241395), (95, 221067), (99, 212135), (105, 200013), (121, 173565), (133, 157905), (145, 144837), (165, 127281), (171, 122815), (203, 103455), (209, 100485), (231, 90915), (261, 80465), (285, 73689), (315, 66671), (319, 65835), (363, 57855), (385, 54549), (399, 52635), (435, 48279), (495, 42427), (551, 38115), (605, 34713), (609, 34485), (627, 33495), (665, 31581), (693, 30305), (847, 24795), (855, 24563), (957, 21945), (1015, 20691), (1045, 20097), (1089, 19285), (1155, 18183), (1197, 17545), (1305, 16093), (1463, 14355), (1595, 13167), (1653, 12705), (1815, 11571), (1827, 11495), (1881, 11165), (1995, 10527), (2233, 9405), (2299, 9135), (2541, 8265), (2755, 7623), (2871, 7315), (3045, 6897), (3135, 6699), (3465, 6061), (3509, 5985), (3857, 5445), (4235, 4959), (4389, 4785)]