21488691

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{449}}^1$

素因数の和:555

約数の個数: 32

約数和(自身を含む): 34214400

約数和(自身を除く): 12725709

約数列:

[1, 3, 7, 21, 43, 53, 129, 159, 301, 371, 449, 903, 1113, 1347, 2279, 3143, 6837, 9429, 15953, 19307, 23797, 47859, 57921, 71391, 135149, 166579, 405447, 499737, 1023271, 3069813, 7162897, 21488691]

約数ペア:

[(1, 21488691), (3, 7162897), (7, 3069813), (21, 1023271), (43, 499737), (53, 405447), (129, 166579), (159, 135149), (301, 71391), (371, 57921), (449, 47859), (903, 23797), (1113, 19307), (1347, 15953), (2279, 9429), (3143, 6837)]