28405420

素因数分解:

$2^2\times 5^1\times {\mathrm{347}}^1\times {\mathrm{4093}}^1$

素因数の和:4449

約数の個数: 24

約数和(自身を含む): 59837904

約数和(自身を除く): 31432484

約数列:

[1, 2, 4, 5, 10, 20, 347, 694, 1388, 1735, 3470, 4093, 6940, 8186, 16372, 20465, 40930, 81860, 1420271, 2840542, 5681084, 7101355, 14202710, 28405420]

約数ペア:

[(1, 28405420), (2, 14202710), (4, 7101355), (5, 5681084), (10, 2840542), (20, 1420271), (347, 81860), (694, 40930), (1388, 20465), (1735, 16372), (3470, 8186), (4093, 6940)]