20999115

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{6763}}^1$

素因数の和:6800

約数の個数: 32

約数和(自身を含む): 38960640

約数和(自身を除く): 17961525

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 115, 135, 207, 345, 621, 1035, 3105, 6763, 20289, 33815, 60867, 101445, 155549, 182601, 304335, 466647, 777745, 913005, 1399941, 2333235, 4199823, 6999705, 20999115]

約数ペア:

[(1, 20999115), (3, 6999705), (5, 4199823), (9, 2333235), (15, 1399941), (23, 913005), (27, 777745), (45, 466647), (69, 304335), (115, 182601), (135, 155549), (207, 101445), (345, 60867), (621, 33815), (1035, 20289), (3105, 6763)]