20788755

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 39137280

約数和(自身を除く): 18348525

約数列:

[1, 3, 5, 13, 15, 19, 31, 39, 57, 65, 93, 95, 155, 181, 195, 247, 285, 403, 465, 543, 589, 741, 905, 1209, 1235, 1767, 2015, 2353, 2715, 2945, 3439, 3705, 5611, 6045, 7059, 7657, 8835, 10317, 11765, 16833, 17195, 22971, 28055, 35295, 38285, 44707, 51585, 72943, 84165, 106609, 114855, 134121, 218829, 223535, 319827, 364715, 533045, 670605, 1094145, 1385917, 1599135, 4157751, 6929585, 20788755]

約数ペア:

[(1, 20788755), (3, 6929585), (5, 4157751), (13, 1599135), (15, 1385917), (19, 1094145), (31, 670605), (39, 533045), (57, 364715), (65, 319827), (93, 223535), (95, 218829), (155, 134121), (181, 114855), (195, 106609), (247, 84165), (285, 72943), (403, 51585), (465, 44707), (543, 38285), (589, 35295), (741, 28055), (905, 22971), (1209, 17195), (1235, 16833), (1767, 11765), (2015, 10317), (2353, 8835), (2715, 7657), (2945, 7059), (3439, 6045), (3705, 5611)]