21152803987

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1544113}}^1$

素因数の和:1544242

約数の個数: 16

約数和(自身を含む): 25694056960

約数和(自身を除く): 4541252973

約数列:

[1, 7, 19, 103, 133, 721, 1957, 13699, 1544113, 10808791, 29338147, 159043639, 205367029, 1113305473, 3021829141, 21152803987]

約数ペア:

[(1, 21152803987), (7, 3021829141), (19, 1113305473), (103, 205367029), (133, 159043639), (721, 29338147), (1957, 10808791), (13699, 1544113)]