21500875

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{823}}^1$

素因数の和:868

約数の個数: 32

約数和(自身を含む): 30850560

約数和(自身を除く): 9349685

約数列:

[1, 5, 11, 19, 25, 55, 95, 125, 209, 275, 475, 823, 1045, 1375, 2375, 4115, 5225, 9053, 15637, 20575, 26125, 45265, 78185, 102875, 172007, 226325, 390925, 860035, 1131625, 1954625, 4300175, 21500875]

約数ペア:

[(1, 21500875), (5, 4300175), (11, 1954625), (19, 1131625), (25, 860035), (55, 390925), (95, 226325), (125, 172007), (209, 102875), (275, 78185), (475, 45265), (823, 26125), (1045, 20575), (1375, 15637), (2375, 9053), (4115, 5225)]