20956971

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{1249}}^1$

素因数の和:1323

約数の個数: 32

約数和(自身を含む): 34560000

約数和(自身を除く): 13603029

約数列:

[1, 3, 7, 17, 21, 47, 51, 119, 141, 329, 357, 799, 987, 1249, 2397, 3747, 5593, 8743, 16779, 21233, 26229, 58703, 63699, 148631, 176109, 410921, 445893, 997951, 1232763, 2993853, 6985657, 20956971]

約数ペア:

[(1, 20956971), (3, 6985657), (7, 2993853), (17, 1232763), (21, 997951), (47, 445893), (51, 410921), (119, 176109), (141, 148631), (329, 63699), (357, 58703), (799, 26229), (987, 21233), (1249, 16779), (2397, 8743), (3747, 5593)]