21391726

素因数分解:

$2^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1\times {\mathrm{991}}^1$

素因数の和:1287

約数の個数: 16

約数和(自身を含む): 32997888

約数和(自身を除く): 11606162

約数列:

[1, 2, 43, 86, 251, 502, 991, 1982, 10793, 21586, 42613, 85226, 248741, 497482, 10695863, 21391726]

約数ペア:

[(1, 21391726), (2, 10695863), (43, 497482), (86, 248741), (251, 85226), (502, 42613), (991, 21586), (1982, 10793)]