21190720

素因数分解:

$2^6\times 5^1\times {\mathrm{66221}}^1$

素因数の和:66238

約数の個数: 28

約数和(自身を含む): 50461164

約数和(自身を除く): 29270444

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 66221, 132442, 264884, 331105, 529768, 662210, 1059536, 1324420, 2119072, 2648840, 4238144, 5297680, 10595360, 21190720]

約数ペア:

[(1, 21190720), (2, 10595360), (4, 5297680), (5, 4238144), (8, 2648840), (10, 2119072), (16, 1324420), (20, 1059536), (32, 662210), (40, 529768), (64, 331105), (80, 264884), (160, 132442), (320, 66221)]