21231225

素因数分解:

$3^2\times 5^2\times {\mathrm{127}}^1\times {\mathrm{743}}^1$

素因数の和:886

約数の個数: 36

約数和(自身を含む): 38378496

約数和(自身を除く): 17147271

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 127, 225, 381, 635, 743, 1143, 1905, 2229, 3175, 3715, 5715, 6687, 9525, 11145, 18575, 28575, 33435, 55725, 94361, 167175, 283083, 471805, 849249, 1415415, 2359025, 4246245, 7077075, 21231225]

約数ペア:

[(1, 21231225), (3, 7077075), (5, 4246245), (9, 2359025), (15, 1415415), (25, 849249), (45, 471805), (75, 283083), (127, 167175), (225, 94361), (381, 55725), (635, 33435), (743, 28575), (1143, 18575), (1905, 11145), (2229, 9525), (3175, 6687), (3715, 5715)]