19903515

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{877}}^1$

素因数の和:991

約数の個数: 32

約数和(自身を含む): 34136640

約数和(自身を除く): 14233125

約数列:

[1, 3, 5, 15, 17, 51, 85, 89, 255, 267, 445, 877, 1335, 1513, 2631, 4385, 4539, 7565, 13155, 14909, 22695, 44727, 74545, 78053, 223635, 234159, 390265, 1170795, 1326901, 3980703, 6634505, 19903515]

約数ペア:

[(1, 19903515), (3, 6634505), (5, 3980703), (15, 1326901), (17, 1170795), (51, 390265), (85, 234159), (89, 223635), (255, 78053), (267, 74545), (445, 44727), (877, 22695), (1335, 14909), (1513, 13155), (2631, 7565), (4385, 4539)]