21242728

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{1301}}^1$

素因数の和:1477

約数の個数: 32

約数和(自身を含む): 43200360

約数和(自身を除く): 21957632

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 157, 314, 628, 1256, 1301, 2041, 2602, 4082, 5204, 8164, 10408, 16328, 16913, 33826, 67652, 135304, 204257, 408514, 817028, 1634056, 2655341, 5310682, 10621364, 21242728]

約数ペア:

[(1, 21242728), (2, 10621364), (4, 5310682), (8, 2655341), (13, 1634056), (26, 817028), (52, 408514), (104, 204257), (157, 135304), (314, 67652), (628, 33826), (1256, 16913), (1301, 16328), (2041, 10408), (2602, 8164), (4082, 5204)]