21383379

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{571}}^1$

素因数の和:672

約数の個数: 32

約数和(自身を含む): 33862400

約数和(自身を除く): 12479021

約数列:

[1, 3, 9, 19, 27, 57, 73, 171, 219, 513, 571, 657, 1387, 1713, 1971, 4161, 5139, 10849, 12483, 15417, 32547, 37449, 41683, 97641, 125049, 292923, 375147, 791977, 1125441, 2375931, 7127793, 21383379]

約数ペア:

[(1, 21383379), (3, 7127793), (9, 2375931), (19, 1125441), (27, 791977), (57, 375147), (73, 292923), (171, 125049), (219, 97641), (513, 41683), (571, 37449), (657, 32547), (1387, 15417), (1713, 12483), (1971, 10849), (4161, 5139)]