20684144

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{277}}^1\times {\mathrm{359}}^1$

素因数の和:657

約数の個数: 40

約数和(自身を含む): 43434720

約数和(自身を除く): 22750576

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 277, 359, 554, 718, 1108, 1436, 2216, 2872, 3601, 4432, 4667, 5744, 7202, 9334, 14404, 18668, 28808, 37336, 57616, 74672, 99443, 198886, 397772, 795544, 1292759, 1591088, 2585518, 5171036, 10342072, 20684144]

約数ペア:

[(1, 20684144), (2, 10342072), (4, 5171036), (8, 2585518), (13, 1591088), (16, 1292759), (26, 795544), (52, 397772), (104, 198886), (208, 99443), (277, 74672), (359, 57616), (554, 37336), (718, 28808), (1108, 18668), (1436, 14404), (2216, 9334), (2872, 7202), (3601, 5744), (4432, 4667)]