21985264

素因数分解:

$2^4\times 7^1\times {\mathrm{73}}^1\times {\mathrm{2689}}^1$

素因数の和:2777

約数の個数: 40

約数和(自身を含む): 49366880

約数和(自身を除く): 27381616

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 73, 112, 146, 292, 511, 584, 1022, 1168, 2044, 2689, 4088, 5378, 8176, 10756, 18823, 21512, 37646, 43024, 75292, 150584, 196297, 301168, 392594, 785188, 1374079, 1570376, 2748158, 3140752, 5496316, 10992632, 21985264]

約数ペア:

[(1, 21985264), (2, 10992632), (4, 5496316), (7, 3140752), (8, 2748158), (14, 1570376), (16, 1374079), (28, 785188), (56, 392594), (73, 301168), (112, 196297), (146, 150584), (292, 75292), (511, 43024), (584, 37646), (1022, 21512), (1168, 18823), (2044, 10756), (2689, 8176), (4088, 5378)]