21220370

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{709}}^1$

素因数の和:830

約数の個数: 32

約数和(自身を含む): 39720240

約数和(自身を除く): 18499870

約数列:

[1, 2, 5, 10, 41, 73, 82, 146, 205, 365, 410, 709, 730, 1418, 2993, 3545, 5986, 7090, 14965, 29069, 29930, 51757, 58138, 103514, 145345, 258785, 290690, 517570, 2122037, 4244074, 10610185, 21220370]

約数ペア:

[(1, 21220370), (2, 10610185), (5, 4244074), (10, 2122037), (41, 517570), (73, 290690), (82, 258785), (146, 145345), (205, 103514), (365, 58138), (410, 51757), (709, 29930), (730, 29069), (1418, 14965), (2993, 7090), (3545, 5986)]