19998681872

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{757067}}^1$

素因数の和:757215

約数の個数: 40

約数和(自身を含む): 42056641536

約数和(自身を除く): 22057959664

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 127, 208, 254, 508, 1016, 1651, 2032, 3302, 6604, 13208, 26416, 757067, 1514134, 3028268, 6056536, 9841871, 12113072, 19683742, 39367484, 78734968, 96147509, 157469936, 192295018, 384590036, 769180072, 1249917617, 1538360144, 2499835234, 4999670468, 9999340936, 19998681872]

約数ペア:

[(1, 19998681872), (2, 9999340936), (4, 4999670468), (8, 2499835234), (13, 1538360144), (16, 1249917617), (26, 769180072), (52, 384590036), (104, 192295018), (127, 157469936), (208, 96147509), (254, 78734968), (508, 39367484), (1016, 19683742), (1651, 12113072), (2032, 9841871), (3302, 6056536), (6604, 3028268), (13208, 1514134), (26416, 757067)]