19704905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{421}}^1$

素因数の和:497

約数の個数: 32

約数和(自身を含む): 27710208

約数和(自身を除く): 8005303

約数列:

[1, 5, 11, 23, 37, 55, 115, 185, 253, 407, 421, 851, 1265, 2035, 2105, 4255, 4631, 9361, 9683, 15577, 23155, 46805, 48415, 77885, 106513, 171347, 358271, 532565, 856735, 1791355, 3940981, 19704905]

約数ペア:

[(1, 19704905), (5, 3940981), (11, 1791355), (23, 856735), (37, 532565), (55, 358271), (115, 171347), (185, 106513), (253, 77885), (407, 48415), (421, 46805), (851, 23155), (1265, 15577), (2035, 9683), (2105, 9361), (4255, 4631)]