21392990

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1979}}^1$

素因数の和:2056

約数の個数: 32

約数和(自身を含む): 41057280

約数和(自身を除く): 19664290

約数列:

[1, 2, 5, 10, 23, 46, 47, 94, 115, 230, 235, 470, 1081, 1979, 2162, 3958, 5405, 9895, 10810, 19790, 45517, 91034, 93013, 186026, 227585, 455170, 465065, 930130, 2139299, 4278598, 10696495, 21392990]

約数ペア:

[(1, 21392990), (2, 10696495), (5, 4278598), (10, 2139299), (23, 930130), (46, 465065), (47, 455170), (94, 227585), (115, 186026), (230, 93013), (235, 91034), (470, 45517), (1081, 19790), (1979, 10810), (2162, 9895), (3958, 5405)]