21529791

素因数分解:

$3^2\times {\mathrm{79}}^1\times {\mathrm{107}}^1\times {\mathrm{283}}^1$

素因数の和:475

約数の個数: 24

約数和(自身を含む): 31898880

約数和(自身を除く): 10369089

約数列:

[1, 3, 9, 79, 107, 237, 283, 321, 711, 849, 963, 2547, 8453, 22357, 25359, 30281, 67071, 76077, 90843, 201213, 272529, 2392199, 7176597, 21529791]

約数ペア:

[(1, 21529791), (3, 7176597), (9, 2392199), (79, 272529), (107, 201213), (237, 90843), (283, 76077), (321, 67071), (711, 30281), (849, 25359), (963, 22357), (2547, 8453)]