20547664

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{257}}^1\times {\mathrm{263}}^1$

素因数の和:547

約数の個数: 40

約数和(自身を含む): 42229440

約数和(自身を除く): 21681776

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 257, 263, 304, 514, 526, 1028, 1052, 2056, 2104, 4112, 4208, 4883, 4997, 9766, 9994, 19532, 19988, 39064, 39976, 67591, 78128, 79952, 135182, 270364, 540728, 1081456, 1284229, 2568458, 5136916, 10273832, 20547664]

約数ペア:

[(1, 20547664), (2, 10273832), (4, 5136916), (8, 2568458), (16, 1284229), (19, 1081456), (38, 540728), (76, 270364), (152, 135182), (257, 79952), (263, 78128), (304, 67591), (514, 39976), (526, 39064), (1028, 19988), (1052, 19532), (2056, 9994), (2104, 9766), (4112, 4997), (4208, 4883)]