19948635

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:217

約数の個数: 72

約数和(自身を含む): 41081040

約数和(自身を除く): 21132405

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 83, 105, 109, 147, 245, 249, 315, 327, 415, 441, 545, 581, 735, 747, 763, 981, 1245, 1635, 1743, 2205, 2289, 2905, 3735, 3815, 4067, 4905, 5229, 5341, 6867, 8715, 9047, 11445, 12201, 16023, 20335, 26145, 26705, 27141, 34335, 36603, 45235, 48069, 61005, 63329, 80115, 81423, 135705, 183015, 189987, 240345, 316645, 407115, 443303, 569961, 949935, 1329909, 2216515, 2849805, 3989727, 6649545, 19948635]

約数ペア:

[(1, 19948635), (3, 6649545), (5, 3989727), (7, 2849805), (9, 2216515), (15, 1329909), (21, 949935), (35, 569961), (45, 443303), (49, 407115), (63, 316645), (83, 240345), (105, 189987), (109, 183015), (147, 135705), (245, 81423), (249, 80115), (315, 63329), (327, 61005), (415, 48069), (441, 45235), (545, 36603), (581, 34335), (735, 27141), (747, 26705), (763, 26145), (981, 20335), (1245, 16023), (1635, 12201), (1743, 11445), (2205, 9047), (2289, 8715), (2905, 6867), (3735, 5341), (3815, 5229), (4067, 4905)]