21280275

素因数分解:

$3^2\times 5^2\times {\mathrm{271}}^1\times {\mathrm{349}}^1$

素因数の和:636

約数の個数: 36

約数和(自身を含む): 38365600

約数和(自身を除く): 17085325

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 271, 349, 813, 1047, 1355, 1745, 2439, 3141, 4065, 5235, 6775, 8725, 12195, 15705, 20325, 26175, 60975, 78525, 94579, 283737, 472895, 851211, 1418685, 2364475, 4256055, 7093425, 21280275]

約数ペア:

[(1, 21280275), (3, 7093425), (5, 4256055), (9, 2364475), (15, 1418685), (25, 851211), (45, 472895), (75, 283737), (225, 94579), (271, 78525), (349, 60975), (813, 26175), (1047, 20325), (1355, 15705), (1745, 12195), (2439, 8725), (3141, 6775), (4065, 5235)]