21109495

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{211}}^1$

素因数の和:351

約数の個数: 32

約数和(自身を含む): 29673216

約数和(自身を除く): 8563721

約数列:

[1, 5, 11, 17, 55, 85, 107, 187, 211, 535, 935, 1055, 1177, 1819, 2321, 3587, 5885, 9095, 11605, 17935, 20009, 22577, 39457, 100045, 112885, 197285, 248347, 383809, 1241735, 1919045, 4221899, 21109495]

約数ペア:

[(1, 21109495), (5, 4221899), (11, 1919045), (17, 1241735), (55, 383809), (85, 248347), (107, 197285), (187, 112885), (211, 100045), (535, 39457), (935, 22577), (1055, 20009), (1177, 17935), (1819, 11605), (2321, 9095), (3587, 5885)]