639772

素因数分解:

$2^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{313}}^1$

素因数の和:397

約数の個数: 24

約数和(自身を含む): 1301216

約数和(自身を除く): 661444

約数列:

[1, 2, 4, 7, 14, 28, 73, 146, 292, 313, 511, 626, 1022, 1252, 2044, 2191, 4382, 8764, 22849, 45698, 91396, 159943, 319886, 639772]

約数ペア:

[(1, 639772), (2, 319886), (4, 159943), (7, 91396), (14, 45698), (28, 22849), (73, 8764), (146, 4382), (292, 2191), (313, 2044), (511, 1252), (626, 1022)]