20637904

素因数分解:

$2^4\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1789}}^1$

素因数の和:1907

約数の個数: 40

約数和(自身を含む): 46167680

約数和(自身を除く): 25529776

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 103, 112, 206, 412, 721, 824, 1442, 1648, 1789, 2884, 3578, 5768, 7156, 11536, 12523, 14312, 25046, 28624, 50092, 100184, 184267, 200368, 368534, 737068, 1289869, 1474136, 2579738, 2948272, 5159476, 10318952, 20637904]

約数ペア:

[(1, 20637904), (2, 10318952), (4, 5159476), (7, 2948272), (8, 2579738), (14, 1474136), (16, 1289869), (28, 737068), (56, 368534), (103, 200368), (112, 184267), (206, 100184), (412, 50092), (721, 28624), (824, 25046), (1442, 14312), (1648, 12523), (1789, 11536), (2884, 7156), (3578, 5768)]