18984890

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{419}}^1$

素因数の和:646

約数の個数: 32

約数和(自身を含む): 35925120

約数和(自身を除く): 16940230

約数列:

[1, 2, 5, 10, 23, 46, 115, 197, 230, 394, 419, 838, 985, 1970, 2095, 4190, 4531, 9062, 9637, 19274, 22655, 45310, 48185, 82543, 96370, 165086, 412715, 825430, 1898489, 3796978, 9492445, 18984890]

約数ペア:

[(1, 18984890), (2, 9492445), (5, 3796978), (10, 1898489), (23, 825430), (46, 412715), (115, 165086), (197, 96370), (230, 82543), (394, 48185), (419, 45310), (838, 22655), (985, 19274), (1970, 9637), (2095, 9062), (4190, 4531)]