21478516

素因数分解:

$2^2\times {\mathrm{97}}^1\times {\mathrm{197}}^1\times {\mathrm{281}}^1$

素因数の和:579

約数の個数: 24

約数和(自身を含む): 38303496

約数和(自身を除く): 16824980

約数列:

[1, 2, 4, 97, 194, 197, 281, 388, 394, 562, 788, 1124, 19109, 27257, 38218, 54514, 55357, 76436, 109028, 110714, 221428, 5369629, 10739258, 21478516]

約数ペア:

[(1, 21478516), (2, 10739258), (4, 5369629), (97, 221428), (194, 110714), (197, 109028), (281, 76436), (388, 55357), (394, 54514), (562, 38218), (788, 27257), (1124, 19109)]