405980

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{383}}^1$

素因数の和:445

約数の個数: 24

約数和(自身を含む): 870912

約数和(自身を除く): 464932

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 383, 530, 766, 1060, 1532, 1915, 3830, 7660, 20299, 40598, 81196, 101495, 202990, 405980]

約数ペア:

[(1, 405980), (2, 202990), (4, 101495), (5, 81196), (10, 40598), (20, 20299), (53, 7660), (106, 3830), (212, 1915), (265, 1532), (383, 1060), (530, 766)]