20918128

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{16979}}^1$

素因数の和:17005

約数の個数: 40

約数和(自身を含む): 50532480

約数和(自身を除く): 29614352

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 44, 56, 77, 88, 112, 154, 176, 308, 616, 1232, 16979, 33958, 67916, 118853, 135832, 186769, 237706, 271664, 373538, 475412, 747076, 950824, 1307383, 1494152, 1901648, 2614766, 2988304, 5229532, 10459064, 20918128]

約数ペア:

[(1, 20918128), (2, 10459064), (4, 5229532), (7, 2988304), (8, 2614766), (11, 1901648), (14, 1494152), (16, 1307383), (22, 950824), (28, 747076), (44, 475412), (56, 373538), (77, 271664), (88, 237706), (112, 186769), (154, 135832), (176, 118853), (308, 67916), (616, 33958), (1232, 16979)]