21747915

素因数分解:

$3^2\times 5^1\times 7^3\times {\mathrm{1409}}^1$

素因数の和:1441

約数の個数: 48

約数和(自身を含む): 43992000

約数和(自身を除く): 22244085

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 343, 441, 735, 1029, 1409, 1715, 2205, 3087, 4227, 5145, 7045, 9863, 12681, 15435, 21135, 29589, 49315, 63405, 69041, 88767, 147945, 207123, 345205, 443835, 483287, 621369, 1035615, 1449861, 2416435, 3106845, 4349583, 7249305, 21747915]

約数ペア:

[(1, 21747915), (3, 7249305), (5, 4349583), (7, 3106845), (9, 2416435), (15, 1449861), (21, 1035615), (35, 621369), (45, 483287), (49, 443835), (63, 345205), (105, 207123), (147, 147945), (245, 88767), (315, 69041), (343, 63405), (441, 49315), (735, 29589), (1029, 21135), (1409, 15435), (1715, 12681), (2205, 9863), (3087, 7045), (4227, 5145)]