21961555

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{281}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 34719840

約数和(自身を除く): 12758285

約数列:

[1, 5, 7, 11, 29, 35, 49, 55, 77, 145, 203, 245, 281, 319, 385, 539, 1015, 1405, 1421, 1595, 1967, 2233, 2695, 3091, 7105, 8149, 9835, 11165, 13769, 15455, 15631, 21637, 40745, 57043, 68845, 78155, 89639, 108185, 151459, 285215, 399301, 448195, 627473, 757295, 1996505, 3137365, 4392311, 21961555]

約数ペア:

[(1, 21961555), (5, 4392311), (7, 3137365), (11, 1996505), (29, 757295), (35, 627473), (49, 448195), (55, 399301), (77, 285215), (145, 151459), (203, 108185), (245, 89639), (281, 78155), (319, 68845), (385, 57043), (539, 40745), (1015, 21637), (1405, 15631), (1421, 15455), (1595, 13769), (1967, 11165), (2233, 9835), (2695, 8149), (3091, 7105)]