20364645

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{269}}^1$

素因数の和:394

約数の個数: 48

約数和(自身を含む): 38413440

約数和(自身を除く): 18048795

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 103, 105, 147, 245, 269, 309, 515, 721, 735, 807, 1345, 1545, 1883, 2163, 3605, 4035, 5047, 5649, 9415, 10815, 13181, 15141, 25235, 27707, 28245, 39543, 65905, 75705, 83121, 138535, 193949, 197715, 415605, 581847, 969745, 1357643, 2909235, 4072929, 6788215, 20364645]

約数ペア:

[(1, 20364645), (3, 6788215), (5, 4072929), (7, 2909235), (15, 1357643), (21, 969745), (35, 581847), (49, 415605), (103, 197715), (105, 193949), (147, 138535), (245, 83121), (269, 75705), (309, 65905), (515, 39543), (721, 28245), (735, 27707), (807, 25235), (1345, 15141), (1545, 13181), (1883, 10815), (2163, 9415), (3605, 5649), (4035, 5047)]