21059005

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{223}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 29611008

約数和(自身を除く): 8552003

約数列:

[1, 5, 11, 17, 55, 85, 101, 187, 223, 505, 935, 1111, 1115, 1717, 2453, 3791, 5555, 8585, 12265, 18887, 18955, 22523, 41701, 94435, 112615, 208505, 247753, 382891, 1238765, 1914455, 4211801, 21059005]

約数ペア:

[(1, 21059005), (5, 4211801), (11, 1914455), (17, 1238765), (55, 382891), (85, 247753), (101, 208505), (187, 112615), (223, 94435), (505, 41701), (935, 22523), (1111, 18955), (1115, 18887), (1717, 12265), (2453, 8585), (3791, 5555)]