21193287

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:223

約数の個数: 32

約数和(自身を含む): 30689280

約数和(自身を除く): 9495993

約数列:

[1, 3, 29, 47, 71, 73, 87, 141, 213, 219, 1363, 2059, 2117, 3337, 3431, 4089, 5183, 6177, 6351, 10011, 10293, 15549, 96773, 99499, 150307, 243601, 290319, 298497, 450921, 730803, 7064429, 21193287]

約数ペア:

[(1, 21193287), (3, 7064429), (29, 730803), (47, 450921), (71, 298497), (73, 290319), (87, 243601), (141, 150307), (213, 99499), (219, 96773), (1363, 15549), (2059, 10293), (2117, 10011), (3337, 6351), (3431, 6177), (4089, 5183)]