21850960

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3847}}^1$

素因数の和:3931

約数の個数: 40

約数和(自身を含む): 51532416

約数和(自身を除く): 29681456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3847, 5680, 7694, 15388, 19235, 30776, 38470, 61552, 76940, 153880, 273137, 307760, 546274, 1092548, 1365685, 2185096, 2731370, 4370192, 5462740, 10925480, 21850960]

約数ペア:

[(1, 21850960), (2, 10925480), (4, 5462740), (5, 4370192), (8, 2731370), (10, 2185096), (16, 1365685), (20, 1092548), (40, 546274), (71, 307760), (80, 273137), (142, 153880), (284, 76940), (355, 61552), (568, 38470), (710, 30776), (1136, 19235), (1420, 15388), (2840, 7694), (3847, 5680)]