20504288

素因数分解:

$2^5\times 7^1\times {\mathrm{239}}^1\times {\mathrm{383}}^1$

素因数の和:639

約数の個数: 48

約数和(自身を含む): 46448640

約数和(自身を除く): 25944352

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 112, 224, 239, 383, 478, 766, 956, 1532, 1673, 1912, 2681, 3064, 3346, 3824, 5362, 6128, 6692, 7648, 10724, 12256, 13384, 21448, 26768, 42896, 53536, 85792, 91537, 183074, 366148, 640759, 732296, 1281518, 1464592, 2563036, 2929184, 5126072, 10252144, 20504288]

約数ペア:

[(1, 20504288), (2, 10252144), (4, 5126072), (7, 2929184), (8, 2563036), (14, 1464592), (16, 1281518), (28, 732296), (32, 640759), (56, 366148), (112, 183074), (224, 91537), (239, 85792), (383, 53536), (478, 42896), (766, 26768), (956, 21448), (1532, 13384), (1673, 12256), (1912, 10724), (2681, 7648), (3064, 6692), (3346, 6128), (3824, 5362)]