20429680

素因数分解:

$2^4\times 5^1\times {\mathrm{255371}}^1$

素因数の和:255384

約数の個数: 20

約数和(自身を含む): 47499192

約数和(自身を除く): 27069512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255371, 510742, 1021484, 1276855, 2042968, 2553710, 4085936, 5107420, 10214840, 20429680]

約数ペア:

[(1, 20429680), (2, 10214840), (4, 5107420), (5, 4085936), (8, 2553710), (10, 2042968), (16, 1276855), (20, 1021484), (40, 510742), (80, 255371)]