2019955760

素因数分解:

$2^4\times 5^1\times {\mathrm{2543}}^1\times {\mathrm{9929}}^1$

素因数の和:12485

約数の個数: 40

約数和(自身を含む): 4698717120

約数和(自身を除く): 2678761360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2543, 5086, 9929, 10172, 12715, 19858, 20344, 25430, 39716, 40688, 49645, 50860, 79432, 99290, 101720, 158864, 198580, 203440, 397160, 794320, 25249447, 50498894, 100997788, 126247235, 201995576, 252494470, 403991152, 504988940, 1009977880, 2019955760]

約数ペア:

[(1, 2019955760), (2, 1009977880), (4, 504988940), (5, 403991152), (8, 252494470), (10, 201995576), (16, 126247235), (20, 100997788), (40, 50498894), (80, 25249447), (2543, 794320), (5086, 397160), (9929, 203440), (10172, 198580), (12715, 158864), (19858, 101720), (20344, 99290), (25430, 79432), (39716, 50860), (40688, 49645)]