18728944

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{709}}^1$

素因数の和:857

約数の個数: 40

約数和(自身を含む): 39441920

約数和(自身を除く): 20712976

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 127, 208, 254, 508, 709, 1016, 1418, 1651, 2032, 2836, 3302, 5672, 6604, 9217, 11344, 13208, 18434, 26416, 36868, 73736, 90043, 147472, 180086, 360172, 720344, 1170559, 1440688, 2341118, 4682236, 9364472, 18728944]

約数ペア:

[(1, 18728944), (2, 9364472), (4, 4682236), (8, 2341118), (13, 1440688), (16, 1170559), (26, 720344), (52, 360172), (104, 180086), (127, 147472), (208, 90043), (254, 73736), (508, 36868), (709, 26416), (1016, 18434), (1418, 13208), (1651, 11344), (2032, 9217), (2836, 6604), (3302, 5672)]