20868925

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{293}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 33247872

約数和(自身を除く): 12378947

約数列:

[1, 5, 7, 11, 25, 35, 37, 55, 77, 175, 185, 259, 275, 293, 385, 407, 925, 1295, 1465, 1925, 2035, 2051, 2849, 3223, 6475, 7325, 10175, 10255, 10841, 14245, 16115, 22561, 51275, 54205, 71225, 75887, 80575, 112805, 119251, 271025, 379435, 564025, 596255, 834757, 1897175, 2981275, 4173785, 20868925]

約数ペア:

[(1, 20868925), (5, 4173785), (7, 2981275), (11, 1897175), (25, 834757), (35, 596255), (37, 564025), (55, 379435), (77, 271025), (175, 119251), (185, 112805), (259, 80575), (275, 75887), (293, 71225), (385, 54205), (407, 51275), (925, 22561), (1295, 16115), (1465, 14245), (1925, 10841), (2035, 10255), (2051, 10175), (2849, 7325), (3223, 6475)]