18977920

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2281}}^1$

素因数の和:2313

約数の個数: 64

約数和(自身を含む): 48880440

約数和(自身を除く): 29902520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 2281, 4160, 4562, 8320, 9124, 11405, 18248, 22810, 29653, 36496, 45620, 59306, 72992, 91240, 118612, 145984, 148265, 182480, 237224, 291968, 296530, 364960, 474448, 593060, 729920, 948896, 1186120, 1459840, 1897792, 2372240, 3795584, 4744480, 9488960, 18977920]

約数ペア:

[(1, 18977920), (2, 9488960), (4, 4744480), (5, 3795584), (8, 2372240), (10, 1897792), (13, 1459840), (16, 1186120), (20, 948896), (26, 729920), (32, 593060), (40, 474448), (52, 364960), (64, 296530), (65, 291968), (80, 237224), (104, 182480), (128, 148265), (130, 145984), (160, 118612), (208, 91240), (260, 72992), (320, 59306), (416, 45620), (520, 36496), (640, 29653), (832, 22810), (1040, 18248), (1664, 11405), (2080, 9124), (2281, 8320), (4160, 4562)]