21987189

素因数分解:

$3^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{5209}}^1$

素因数の和:5289

約数の個数: 24

約数和(自身を含む): 36845120

約数和(自身を除く): 14857931

約数列:

[1, 3, 7, 9, 21, 63, 67, 201, 469, 603, 1407, 4221, 5209, 15627, 36463, 46881, 109389, 328167, 349003, 1047009, 2443021, 3141027, 7329063, 21987189]

約数ペア:

[(1, 21987189), (3, 7329063), (7, 3141027), (9, 2443021), (21, 1047009), (63, 349003), (67, 328167), (201, 109389), (469, 46881), (603, 36463), (1407, 15627), (4221, 5209)]