20903931

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{317}}^1\times {\mathrm{431}}^1$

素因数の和:771

約数の個数: 24

約数和(自身を含む): 32145984

約数和(自身を除く): 11242053

約数列:

[1, 3, 9, 17, 51, 153, 317, 431, 951, 1293, 2853, 3879, 5389, 7327, 16167, 21981, 48501, 65943, 136627, 409881, 1229643, 2322659, 6967977, 20903931]

約数ペア:

[(1, 20903931), (3, 6967977), (9, 2322659), (17, 1229643), (51, 409881), (153, 136627), (317, 65943), (431, 48501), (951, 21981), (1293, 16167), (2853, 7327), (3879, 5389)]