21309673

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{139}}^1\times {\mathrm{181}}^1$

素因数の和:349

約数の個数: 24

約数和(自身を含む): 27110720

約数和(自身を除く): 5801047

約数列:

[1, 7, 11, 77, 121, 139, 181, 847, 973, 1267, 1529, 1991, 10703, 13937, 16819, 21901, 25159, 117733, 153307, 176113, 276749, 1937243, 3044239, 21309673]

約数ペア:

[(1, 21309673), (7, 3044239), (11, 1937243), (77, 276749), (121, 176113), (139, 153307), (181, 117733), (847, 25159), (973, 21901), (1267, 16819), (1529, 13937), (1991, 10703)]