20107984

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{277}}^1\times {\mathrm{349}}^1$

素因数の和:647

約数の個数: 40

約数和(自身を含む): 42228200

約数和(自身を除く): 22120216

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 277, 349, 554, 698, 1108, 1396, 2216, 2792, 3601, 4432, 4537, 5584, 7202, 9074, 14404, 18148, 28808, 36296, 57616, 72592, 96673, 193346, 386692, 773384, 1256749, 1546768, 2513498, 5026996, 10053992, 20107984]

約数ペア:

[(1, 20107984), (2, 10053992), (4, 5026996), (8, 2513498), (13, 1546768), (16, 1256749), (26, 773384), (52, 386692), (104, 193346), (208, 96673), (277, 72592), (349, 57616), (554, 36296), (698, 28808), (1108, 18148), (1396, 14404), (2216, 9074), (2792, 7202), (3601, 5584), (4432, 4537)]