18528125

素因数分解:

$5^5\times 7^2\times {\mathrm{11}}^2$

素因数の和:61

約数の個数: 54

約数和(自身を含む): 29611386

約数和(自身を除く): 11083261

約数列:

[1, 5, 7, 11, 25, 35, 49, 55, 77, 121, 125, 175, 245, 275, 385, 539, 605, 625, 847, 875, 1225, 1375, 1925, 2695, 3025, 3125, 4235, 4375, 5929, 6125, 6875, 9625, 13475, 15125, 21175, 21875, 29645, 30625, 34375, 48125, 67375, 75625, 105875, 148225, 153125, 240625, 336875, 378125, 529375, 741125, 1684375, 2646875, 3705625, 18528125]

約数ペア:

[(1, 18528125), (5, 3705625), (7, 2646875), (11, 1684375), (25, 741125), (35, 529375), (49, 378125), (55, 336875), (77, 240625), (121, 153125), (125, 148225), (175, 105875), (245, 75625), (275, 67375), (385, 48125), (539, 34375), (605, 30625), (625, 29645), (847, 21875), (875, 21175), (1225, 15125), (1375, 13475), (1925, 9625), (2695, 6875), (3025, 6125), (3125, 5929), (4235, 4375)]