20389095

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{257}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 37189152

約数和(自身を除く): 16800057

約数列:

[1, 3, 5, 9, 15, 41, 43, 45, 123, 129, 205, 215, 257, 369, 387, 615, 645, 771, 1285, 1763, 1845, 1935, 2313, 3855, 5289, 8815, 10537, 11051, 11565, 15867, 26445, 31611, 33153, 52685, 55255, 79335, 94833, 99459, 158055, 165765, 453091, 474165, 497295, 1359273, 2265455, 4077819, 6796365, 20389095]

約数ペア:

[(1, 20389095), (3, 6796365), (5, 4077819), (9, 2265455), (15, 1359273), (41, 497295), (43, 474165), (45, 453091), (123, 165765), (129, 158055), (205, 99459), (215, 94833), (257, 79335), (369, 55255), (387, 52685), (615, 33153), (645, 31611), (771, 26445), (1285, 15867), (1763, 11565), (1845, 11051), (1935, 10537), (2313, 8815), (3855, 5289)]