21720825

素因数分解:

$3^3\times 5^2\times 7^1\times {\mathrm{4597}}^1$

素因数の和:4623

約数の個数: 48

約数和(自身を含む): 45612160

約数和(自身を除く): 23891335

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 27, 35, 45, 63, 75, 105, 135, 175, 189, 225, 315, 525, 675, 945, 1575, 4597, 4725, 13791, 22985, 32179, 41373, 68955, 96537, 114925, 124119, 160895, 206865, 289611, 344775, 482685, 620595, 804475, 868833, 1034325, 1448055, 2413425, 3102975, 4344165, 7240275, 21720825]

約数ペア:

[(1, 21720825), (3, 7240275), (5, 4344165), (7, 3102975), (9, 2413425), (15, 1448055), (21, 1034325), (25, 868833), (27, 804475), (35, 620595), (45, 482685), (63, 344775), (75, 289611), (105, 206865), (135, 160895), (175, 124119), (189, 114925), (225, 96537), (315, 68955), (525, 41373), (675, 32179), (945, 22985), (1575, 13791), (4597, 4725)]