21478640

素因数分解:

$2^4\times 5^1\times {\mathrm{383}}^1\times {\mathrm{701}}^1$

素因数の和:1097

約数の個数: 40

約数和(自身を含む): 50139648

約数和(自身を除く): 28661008

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 383, 701, 766, 1402, 1532, 1915, 2804, 3064, 3505, 3830, 5608, 6128, 7010, 7660, 11216, 14020, 15320, 28040, 30640, 56080, 268483, 536966, 1073932, 1342415, 2147864, 2684830, 4295728, 5369660, 10739320, 21478640]

約数ペア:

[(1, 21478640), (2, 10739320), (4, 5369660), (5, 4295728), (8, 2684830), (10, 2147864), (16, 1342415), (20, 1073932), (40, 536966), (80, 268483), (383, 56080), (701, 30640), (766, 28040), (1402, 15320), (1532, 14020), (1915, 11216), (2804, 7660), (3064, 7010), (3505, 6128), (3830, 5608)]