19906815

素因数分解:

$3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{107}}^1\times {\mathrm{157}}^1$

素因数の和:351

約数の個数: 32

約数和(自身を含む): 32762880

約数和(自身を除く): 12856065

約数列:

[1, 3, 5, 15, 79, 107, 157, 237, 321, 395, 471, 535, 785, 1185, 1605, 2355, 8453, 12403, 16799, 25359, 37209, 42265, 50397, 62015, 83995, 126795, 186045, 251985, 1327121, 3981363, 6635605, 19906815]

約数ペア:

[(1, 19906815), (3, 6635605), (5, 3981363), (15, 1327121), (79, 251985), (107, 186045), (157, 126795), (237, 83995), (321, 62015), (395, 50397), (471, 42265), (535, 37209), (785, 25359), (1185, 16799), (1605, 12403), (2355, 8453)]