21231075

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{317}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 37854720

約数和(自身を除く): 16623645

約数列:

[1, 3, 5, 15, 19, 25, 47, 57, 75, 95, 141, 235, 285, 317, 475, 705, 893, 951, 1175, 1425, 1585, 2679, 3525, 4465, 4755, 6023, 7925, 13395, 14899, 18069, 22325, 23775, 30115, 44697, 66975, 74495, 90345, 150575, 223485, 283081, 372475, 451725, 849243, 1117425, 1415405, 4246215, 7077025, 21231075]

約数ペア:

[(1, 21231075), (3, 7077025), (5, 4246215), (15, 1415405), (19, 1117425), (25, 849243), (47, 451725), (57, 372475), (75, 283081), (95, 223485), (141, 150575), (235, 90345), (285, 74495), (317, 66975), (475, 44697), (705, 30115), (893, 23775), (951, 22325), (1175, 18069), (1425, 14899), (1585, 13395), (2679, 7925), (3525, 6023), (4465, 4755)]