20520513

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{181}}^1$

素因数の和:239

約数の個数: 64

約数和(自身を含む): 36691200

約数和(自身を除く): 16170687

約数列:

[1, 3, 9, 13, 17, 19, 27, 39, 51, 57, 117, 153, 171, 181, 221, 247, 323, 351, 459, 513, 543, 663, 741, 969, 1629, 1989, 2223, 2353, 2907, 3077, 3439, 4199, 4887, 5967, 6669, 7059, 8721, 9231, 10317, 12597, 21177, 27693, 30951, 37791, 40001, 44707, 58463, 63531, 83079, 92853, 113373, 120003, 134121, 175389, 360009, 402363, 526167, 760019, 1080027, 1207089, 1578501, 2280057, 6840171, 20520513]

約数ペア:

[(1, 20520513), (3, 6840171), (9, 2280057), (13, 1578501), (17, 1207089), (19, 1080027), (27, 760019), (39, 526167), (51, 402363), (57, 360009), (117, 175389), (153, 134121), (171, 120003), (181, 113373), (221, 92853), (247, 83079), (323, 63531), (351, 58463), (459, 44707), (513, 40001), (543, 37791), (663, 30951), (741, 27693), (969, 21177), (1629, 12597), (1989, 10317), (2223, 9231), (2353, 8721), (2907, 7059), (3077, 6669), (3439, 5967), (4199, 4887)]