21395775

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{173}}^1$

素因数の和:300

約数の個数: 48

約数和(自身を含む): 38060064

約数和(自身を除く): 16664289

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 97, 173, 255, 291, 425, 485, 519, 865, 1275, 1455, 1649, 2425, 2595, 2941, 4325, 4947, 7275, 8245, 8823, 12975, 14705, 16781, 24735, 41225, 44115, 50343, 73525, 83905, 123675, 220575, 251715, 285277, 419525, 855831, 1258575, 1426385, 4279155, 7131925, 21395775]

約数ペア:

[(1, 21395775), (3, 7131925), (5, 4279155), (15, 1426385), (17, 1258575), (25, 855831), (51, 419525), (75, 285277), (85, 251715), (97, 220575), (173, 123675), (255, 83905), (291, 73525), (425, 50343), (485, 44115), (519, 41225), (865, 24735), (1275, 16781), (1455, 14705), (1649, 12975), (2425, 8823), (2595, 8245), (2941, 7275), (4325, 4947)]