21398878

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{647}}^1\times {\mathrm{719}}^1$

素因数の和:1391

約数の個数: 16

約数和(自身を含む): 33592320

約数和(自身を除く): 12193442

約数列:

[1, 2, 23, 46, 647, 719, 1294, 1438, 14881, 16537, 29762, 33074, 465193, 930386, 10699439, 21398878]

約数ペア:

[(1, 21398878), (2, 10699439), (23, 930386), (46, 465193), (647, 33074), (719, 29762), (1294, 16537), (1438, 14881)]