21781186270

素因数分解:

$2^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{661439}}^1$

素因数の和:661572

約数の個数: 32

約数和(自身を含む): 40718246400

約数和(自身を除く): 18937060130

約数列:

[1, 2, 5, 10, 37, 74, 89, 178, 185, 370, 445, 890, 3293, 6586, 16465, 32930, 661439, 1322878, 3307195, 6614390, 24473243, 48946486, 58868071, 117736142, 122366215, 244732430, 294340355, 588680710, 2178118627, 4356237254, 10890593135, 21781186270]

約数ペア:

[(1, 21781186270), (2, 10890593135), (5, 4356237254), (10, 2178118627), (37, 588680710), (74, 294340355), (89, 244732430), (178, 122366215), (185, 117736142), (370, 58868071), (445, 48946486), (890, 24473243), (3293, 6614390), (6586, 3307195), (16465, 1322878), (32930, 661439)]