20829471

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{353}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 32114880

約数和(自身を除く): 11285409

約数列:

[1, 3, 13, 17, 39, 51, 89, 221, 267, 353, 663, 1059, 1157, 1513, 3471, 4539, 4589, 6001, 13767, 18003, 19669, 31417, 59007, 78013, 94251, 234039, 408421, 534089, 1225263, 1602267, 6943157, 20829471]

約数ペア:

[(1, 20829471), (3, 6943157), (13, 1602267), (17, 1225263), (39, 534089), (51, 408421), (89, 234039), (221, 94251), (267, 78013), (353, 59007), (663, 31417), (1059, 19669), (1157, 18003), (1513, 13767), (3471, 6001), (4539, 4589)]