21227997

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{641}}^1$

素因数の和:753

約数の個数: 32

約数和(自身を含む): 34513920

約数和(自身を除く): 13285923

約数列:

[1, 3, 7, 19, 21, 57, 83, 133, 249, 399, 581, 641, 1577, 1743, 1923, 4487, 4731, 11039, 12179, 13461, 33117, 36537, 53203, 85253, 159609, 255759, 372421, 1010857, 1117263, 3032571, 7075999, 21227997]

約数ペア:

[(1, 21227997), (3, 7075999), (7, 3032571), (19, 1117263), (21, 1010857), (57, 372421), (83, 255759), (133, 159609), (249, 85253), (399, 53203), (581, 36537), (641, 33117), (1577, 13461), (1743, 12179), (1923, 11039), (4487, 4731)]