21807340

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2803}}^1$

素因数の和:3201

約数の個数: 24

約数和(自身を含む): 45929520

約数和(自身を除く): 24122180

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 2803, 3890, 5606, 7780, 11212, 14015, 28030, 56060, 1090367, 2180734, 4361468, 5451835, 10903670, 21807340]

約数ペア:

[(1, 21807340), (2, 10903670), (4, 5451835), (5, 4361468), (10, 2180734), (20, 1090367), (389, 56060), (778, 28030), (1556, 14015), (1945, 11212), (2803, 7780), (3890, 5606)]