21906675

素因数分解:

$3^2\times 5^2\times 7^2\times {\mathrm{1987}}^1$

素因数の和:2017

約数の個数: 54

約数和(自身を含む): 45666348

約数和(自身を除く): 23759673

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 49, 63, 75, 105, 147, 175, 225, 245, 315, 441, 525, 735, 1225, 1575, 1987, 2205, 3675, 5961, 9935, 11025, 13909, 17883, 29805, 41727, 49675, 69545, 89415, 97363, 125181, 149025, 208635, 292089, 347725, 447075, 486815, 625905, 876267, 1043175, 1460445, 2434075, 3129525, 4381335, 7302225, 21906675]

約数ペア:

[(1, 21906675), (3, 7302225), (5, 4381335), (7, 3129525), (9, 2434075), (15, 1460445), (21, 1043175), (25, 876267), (35, 625905), (45, 486815), (49, 447075), (63, 347725), (75, 292089), (105, 208635), (147, 149025), (175, 125181), (225, 97363), (245, 89415), (315, 69545), (441, 49675), (525, 41727), (735, 29805), (1225, 17883), (1575, 13909), (1987, 11025), (2205, 9935), (3675, 5961)]