21841040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{21001}}^1$

素因数の和:21027

約数の個数: 40

約数和(自身を含む): 54689208

約数和(自身を除く): 32848168

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 21001, 42002, 84004, 105005, 168008, 210010, 273013, 336016, 420020, 546026, 840040, 1092052, 1365065, 1680080, 2184104, 2730130, 4368208, 5460260, 10920520, 21841040]

約数ペア:

[(1, 21841040), (2, 10920520), (4, 5460260), (5, 4368208), (8, 2730130), (10, 2184104), (13, 1680080), (16, 1365065), (20, 1092052), (26, 840040), (40, 546026), (52, 420020), (65, 336016), (80, 273013), (104, 210010), (130, 168008), (208, 105005), (260, 84004), (520, 42002), (1040, 21001)]