21135975

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{127}}^1\times {\mathrm{317}}^1$

素因数の和:464

約数の個数: 48

約数和(自身を含む): 40378368

約数和(自身を除く): 19242393

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 127, 175, 317, 381, 525, 635, 889, 951, 1585, 1905, 2219, 2667, 3175, 4445, 4755, 6657, 7925, 9525, 11095, 13335, 22225, 23775, 33285, 40259, 55475, 66675, 120777, 166425, 201295, 281813, 603885, 845439, 1006475, 1409065, 3019425, 4227195, 7045325, 21135975]

約数ペア:

[(1, 21135975), (3, 7045325), (5, 4227195), (7, 3019425), (15, 1409065), (21, 1006475), (25, 845439), (35, 603885), (75, 281813), (105, 201295), (127, 166425), (175, 120777), (317, 66675), (381, 55475), (525, 40259), (635, 33285), (889, 23775), (951, 22225), (1585, 13335), (1905, 11095), (2219, 9525), (2667, 7925), (3175, 6657), (4445, 4755)]