644385

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2$

素因数の和:70

約数の個数: 48

約数和(自身を含む): 1316736

約数和(自身を除く): 672351

約数列:

[1, 3, 5, 7, 15, 17, 19, 21, 35, 51, 57, 85, 95, 105, 119, 133, 255, 285, 323, 357, 361, 399, 595, 665, 969, 1083, 1615, 1785, 1805, 1995, 2261, 2527, 4845, 5415, 6137, 6783, 7581, 11305, 12635, 18411, 30685, 33915, 37905, 42959, 92055, 128877, 214795, 644385]

約数ペア:

[(1, 644385), (3, 214795), (5, 128877), (7, 92055), (15, 42959), (17, 37905), (19, 33915), (21, 30685), (35, 18411), (51, 12635), (57, 11305), (85, 7581), (95, 6783), (105, 6137), (119, 5415), (133, 4845), (255, 2527), (285, 2261), (323, 1995), (357, 1805), (361, 1785), (399, 1615), (595, 1083), (665, 969)]