21221028

素因数分解:

$2^2\times 3^4\times {\mathrm{65497}}^1$

素因数の和:65513

約数の個数: 30

約数和(自身を含む): 55476806

約数和(自身を除く): 34255778

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 324, 65497, 130994, 196491, 261988, 392982, 589473, 785964, 1178946, 1768419, 2357892, 3536838, 5305257, 7073676, 10610514, 21221028]

約数ペア:

[(1, 21221028), (2, 10610514), (3, 7073676), (4, 5305257), (6, 3536838), (9, 2357892), (12, 1768419), (18, 1178946), (27, 785964), (36, 589473), (54, 392982), (81, 261988), (108, 196491), (162, 130994), (324, 65497)]