20589680

素因数分解:

$2^4\times 5^1\times {\mathrm{257371}}^1$

素因数の和:257384

約数の個数: 20

約数和(自身を含む): 47871192

約数和(自身を除く): 27281512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257371, 514742, 1029484, 1286855, 2058968, 2573710, 4117936, 5147420, 10294840, 20589680]

約数ペア:

[(1, 20589680), (2, 10294840), (4, 5147420), (5, 4117936), (8, 2573710), (10, 2058968), (16, 1286855), (20, 1029484), (40, 514742), (80, 257371)]