19989584

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{643}}^1$

素因数の和:747

約数の個数: 40

約数和(自身を含む): 40726560

約数和(自身を除く): 20736976

約数列:

[1, 2, 4, 8, 16, 29, 58, 67, 116, 134, 232, 268, 464, 536, 643, 1072, 1286, 1943, 2572, 3886, 5144, 7772, 10288, 15544, 18647, 31088, 37294, 43081, 74588, 86162, 149176, 172324, 298352, 344648, 689296, 1249349, 2498698, 4997396, 9994792, 19989584]

約数ペア:

[(1, 19989584), (2, 9994792), (4, 4997396), (8, 2498698), (16, 1249349), (29, 689296), (58, 344648), (67, 298352), (116, 172324), (134, 149176), (232, 86162), (268, 74588), (464, 43081), (536, 37294), (643, 31088), (1072, 18647), (1286, 15544), (1943, 10288), (2572, 7772), (3886, 5144)]