21661278

素因数分解:

$2^1\times 3^1\times {\mathrm{991}}^1\times {\mathrm{3643}}^1$

素因数の和:4639

約数の個数: 16

約数和(自身を含む): 43378176

約数和(自身を除く): 21716898

約数列:

[1, 2, 3, 6, 991, 1982, 2973, 3643, 5946, 7286, 10929, 21858, 3610213, 7220426, 10830639, 21661278]

約数ペア:

[(1, 21661278), (2, 10830639), (3, 7220426), (6, 3610213), (991, 21858), (1982, 10929), (2973, 7286), (3643, 5946)]