21981309

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{619}}^1$

素因数の和:737

約数の個数: 32

約数和(自身を含む): 35712000

約数和(自身を除く): 13730691

約数列:

[1, 3, 7, 19, 21, 57, 89, 133, 267, 399, 619, 623, 1691, 1857, 1869, 4333, 5073, 11761, 11837, 12999, 35283, 35511, 55091, 82327, 165273, 246981, 385637, 1046729, 1156911, 3140187, 7327103, 21981309]

約数ペア:

[(1, 21981309), (3, 7327103), (7, 3140187), (19, 1156911), (21, 1046729), (57, 385637), (89, 246981), (133, 165273), (267, 82327), (399, 55091), (619, 35511), (623, 35283), (1691, 12999), (1857, 11837), (1869, 11761), (4333, 5073)]