199958140

素因数分解:

$2^2\times 5^1\times {\mathrm{431}}^1\times {\mathrm{23197}}^1$

素因数の和:23637

約数の個数: 24

約数和(自身を含む): 420904512

約数和(自身を除く): 220946372

約数列:

[1, 2, 4, 5, 10, 20, 431, 862, 1724, 2155, 4310, 8620, 23197, 46394, 92788, 115985, 231970, 463940, 9997907, 19995814, 39991628, 49989535, 99979070, 199958140]

約数ペア:

[(1, 199958140), (2, 99979070), (4, 49989535), (5, 39991628), (10, 19995814), (20, 9997907), (431, 463940), (862, 231970), (1724, 115985), (2155, 92788), (4310, 46394), (8620, 23197)]