20948720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20143}}^1$

素因数の和:20169

約数の個数: 40

約数和(自身を含む): 52454976

約数和(自身を除く): 31506256

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20143, 40286, 80572, 100715, 161144, 201430, 261859, 322288, 402860, 523718, 805720, 1047436, 1309295, 1611440, 2094872, 2618590, 4189744, 5237180, 10474360, 20948720]

約数ペア:

[(1, 20948720), (2, 10474360), (4, 5237180), (5, 4189744), (8, 2618590), (10, 2094872), (13, 1611440), (16, 1309295), (20, 1047436), (26, 805720), (40, 523718), (52, 402860), (65, 322288), (80, 261859), (104, 201430), (130, 161144), (208, 100715), (260, 80572), (520, 40286), (1040, 20143)]