20489847

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{577}}^1$

素因数の和:695

約数の個数: 32

約数和(自身を含む): 33292800

約数和(自身を除く): 12802953

約数列:

[1, 3, 7, 19, 21, 57, 89, 133, 267, 399, 577, 623, 1691, 1731, 1869, 4039, 5073, 10963, 11837, 12117, 32889, 35511, 51353, 76741, 154059, 230223, 359471, 975707, 1078413, 2927121, 6829949, 20489847]

約数ペア:

[(1, 20489847), (3, 6829949), (7, 2927121), (19, 1078413), (21, 975707), (57, 359471), (89, 230223), (133, 154059), (267, 76741), (399, 51353), (577, 35511), (623, 32889), (1691, 12117), (1731, 11837), (1869, 10963), (4039, 5073)]