21406791

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{983}}^1$

素因数の和:1071

約数の個数: 32

約数和(自身を含む): 35140608

約数和(自身を除く): 13733817

約数列:

[1, 3, 7, 17, 21, 51, 61, 119, 183, 357, 427, 983, 1037, 1281, 2949, 3111, 6881, 7259, 16711, 20643, 21777, 50133, 59963, 116977, 179889, 350931, 419741, 1019371, 1259223, 3058113, 7135597, 21406791]

約数ペア:

[(1, 21406791), (3, 7135597), (7, 3058113), (17, 1259223), (21, 1019371), (51, 419741), (61, 350931), (119, 179889), (183, 116977), (357, 59963), (427, 50133), (983, 21777), (1037, 20643), (1281, 16711), (2949, 7259), (3111, 6881)]