20857375

素因数分解:

$5^3\times 7^1\times {\mathrm{11}}^2\times {\mathrm{197}}^1$

素因数の和:241

約数の個数: 48

約数和(自身を含む): 32864832

約数和(自身を除く): 12007457

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 121, 125, 175, 197, 275, 385, 605, 847, 875, 985, 1375, 1379, 1925, 2167, 3025, 4235, 4925, 6895, 9625, 10835, 15125, 15169, 21175, 23837, 24625, 34475, 54175, 75845, 105875, 119185, 166859, 172375, 270875, 379225, 595925, 834295, 1896125, 2979625, 4171475, 20857375]

約数ペア:

[(1, 20857375), (5, 4171475), (7, 2979625), (11, 1896125), (25, 834295), (35, 595925), (55, 379225), (77, 270875), (121, 172375), (125, 166859), (175, 119185), (197, 105875), (275, 75845), (385, 54175), (605, 34475), (847, 24625), (875, 23837), (985, 21175), (1375, 15169), (1379, 15125), (1925, 10835), (2167, 9625), (3025, 6895), (4235, 4925)]