21838640

素因数分解:

$2^4\times 5^1\times {\mathrm{272983}}^1$

素因数の和:272996

約数の個数: 20

約数和(自身を含む): 50775024

約数和(自身を除く): 28936384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272983, 545966, 1091932, 1364915, 2183864, 2729830, 4367728, 5459660, 10919320, 21838640]

約数ペア:

[(1, 21838640), (2, 10919320), (4, 5459660), (5, 4367728), (8, 2729830), (10, 2183864), (16, 1364915), (20, 1091932), (40, 545966), (80, 272983)]