20649955

素因数分解:

$5^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1\times {\mathrm{397}}^1$

素因数の和:606

約数の個数: 16

約数和(自身を含む): 25331904

約数和(自身を除く): 4681949

約数列:

[1, 5, 101, 103, 397, 505, 515, 1985, 10403, 40097, 40891, 52015, 200485, 204455, 4129991, 20649955]

約数ペア:

[(1, 20649955), (5, 4129991), (101, 204455), (103, 200485), (397, 52015), (505, 40891), (515, 40097), (1985, 10403)]