21553091

素因数分解:

$7^3\times {\mathrm{31}}^1\times {\mathrm{2027}}^1$

素因数の和:2079

約数の個数: 16

約数和(自身を含む): 25958400

約数和(自身を除く): 4405309

約数列:

[1, 7, 31, 49, 217, 343, 1519, 2027, 10633, 14189, 62837, 99323, 439859, 695261, 3079013, 21553091]

約数ペア:

[(1, 21553091), (7, 3079013), (31, 695261), (49, 439859), (217, 99323), (343, 62837), (1519, 14189), (2027, 10633)]