18718640

素因数分解:

$2^4\times 5^1\times {\mathrm{233983}}^1$

素因数の和:233996

約数の個数: 20

約数和(自身を含む): 43521024

約数和(自身を除く): 24802384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 233983, 467966, 935932, 1169915, 1871864, 2339830, 3743728, 4679660, 9359320, 18718640]

約数ペア:

[(1, 18718640), (2, 9359320), (4, 4679660), (5, 3743728), (8, 2339830), (10, 1871864), (16, 1169915), (20, 935932), (40, 467966), (80, 233983)]