639388

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{179}}^1$

素因数の和:249

約数の個数: 24

約数和(自身を含む): 1209600

約数和(自身を除く): 570212

約数列:

[1, 2, 4, 19, 38, 47, 76, 94, 179, 188, 358, 716, 893, 1786, 3401, 3572, 6802, 8413, 13604, 16826, 33652, 159847, 319694, 639388]

約数ペア:

[(1, 639388), (2, 319694), (4, 159847), (19, 33652), (38, 16826), (47, 13604), (76, 8413), (94, 6802), (179, 3572), (188, 3401), (358, 1786), (716, 893)]