639188260

素因数分解:

$2^2\times 5^1\times {\mathrm{1907}}^1\times {\mathrm{16759}}^1$

素因数の和:18675

約数の個数: 24

約数和(自身を含む): 1343079360

約数和(自身を除く): 703891100

約数列:

[1, 2, 4, 5, 10, 20, 1907, 3814, 7628, 9535, 16759, 19070, 33518, 38140, 67036, 83795, 167590, 335180, 31959413, 63918826, 127837652, 159797065, 319594130, 639188260]

約数ペア:

[(1, 639188260), (2, 319594130), (4, 159797065), (5, 127837652), (10, 63918826), (20, 31959413), (1907, 335180), (3814, 167590), (7628, 83795), (9535, 67036), (16759, 38140), (19070, 33518)]