21225578

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{139}}^1\times {\mathrm{631}}^1$

素因数の和:794

約数の個数: 24

約数和(自身を含む): 35303520

約数和(自身を除く): 14077942

約数列:

[1, 2, 11, 22, 121, 139, 242, 278, 631, 1262, 1529, 3058, 6941, 13882, 16819, 33638, 76351, 87709, 152702, 175418, 964799, 1929598, 10612789, 21225578]

約数ペア:

[(1, 21225578), (2, 10612789), (11, 1929598), (22, 964799), (121, 175418), (139, 152702), (242, 87709), (278, 76351), (631, 33638), (1262, 16819), (1529, 13882), (3058, 6941)]