21879025

素因数分解:

$5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1$

素因数の和:194

約数の個数: 48

約数和(自身を含む): 33172480

約数和(自身を除く): 11293455

約数列:

[1, 5, 7, 25, 31, 35, 37, 109, 155, 175, 185, 217, 259, 545, 763, 775, 925, 1085, 1147, 1295, 2725, 3379, 3815, 4033, 5425, 5735, 6475, 8029, 16895, 19075, 20165, 23653, 28231, 28675, 40145, 84475, 100825, 118265, 125023, 141155, 200725, 591325, 625115, 705775, 875161, 3125575, 4375805, 21879025]

約数ペア:

[(1, 21879025), (5, 4375805), (7, 3125575), (25, 875161), (31, 705775), (35, 625115), (37, 591325), (109, 200725), (155, 141155), (175, 125023), (185, 118265), (217, 100825), (259, 84475), (545, 40145), (763, 28675), (775, 28231), (925, 23653), (1085, 20165), (1147, 19075), (1295, 16895), (2725, 8029), (3379, 6475), (3815, 5735), (4033, 5425)]