19895715

素因数分解:

$3^2\times 5^1\times 7^3\times {\mathrm{1289}}^1$

素因数の和:1321

約数の個数: 48

約数和(自身を含む): 40248000

約数和(自身を除く): 20352285

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 343, 441, 735, 1029, 1289, 1715, 2205, 3087, 3867, 5145, 6445, 9023, 11601, 15435, 19335, 27069, 45115, 58005, 63161, 81207, 135345, 189483, 315805, 406035, 442127, 568449, 947415, 1326381, 2210635, 2842245, 3979143, 6631905, 19895715]

約数ペア:

[(1, 19895715), (3, 6631905), (5, 3979143), (7, 2842245), (9, 2210635), (15, 1326381), (21, 947415), (35, 568449), (45, 442127), (49, 406035), (63, 315805), (105, 189483), (147, 135345), (245, 81207), (315, 63161), (343, 58005), (441, 45115), (735, 27069), (1029, 19335), (1289, 15435), (1715, 11601), (2205, 9023), (3087, 6445), (3867, 5145)]