21224987

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:291

約数の個数: 24

約数和(自身を含む): 25937280

約数和(自身を除く): 4712293

約数列:

[1, 7, 31, 49, 89, 157, 217, 623, 1099, 1519, 2759, 4361, 4867, 7693, 13973, 19313, 34069, 97811, 135191, 238483, 433163, 684677, 3032141, 21224987]

約数ペア:

[(1, 21224987), (7, 3032141), (31, 684677), (49, 433163), (89, 238483), (157, 135191), (217, 97811), (623, 34069), (1099, 19313), (1519, 13973), (2759, 7693), (4361, 4867)]