20091995

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{2269}}^1$

素因数の和:2315

約数の個数: 32

約数和(自身を含む): 31380480

約数和(自身を除く): 11288485

約数列:

[1, 5, 7, 11, 23, 35, 55, 77, 115, 161, 253, 385, 805, 1265, 1771, 2269, 8855, 11345, 15883, 24959, 52187, 79415, 124795, 174713, 260935, 365309, 574057, 873565, 1826545, 2870285, 4018399, 20091995]

約数ペア:

[(1, 20091995), (5, 4018399), (7, 2870285), (11, 1826545), (23, 873565), (35, 574057), (55, 365309), (77, 260935), (115, 174713), (161, 124795), (253, 79415), (385, 52187), (805, 24959), (1265, 15883), (1771, 11345), (2269, 8855)]