19983990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{51241}}^1$

素因数の和:51264

約数の個数: 32

約数和(自身を含む): 51651936

約数和(自身を除く): 31667946

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 51241, 102482, 153723, 256205, 307446, 512410, 666133, 768615, 1332266, 1537230, 1998399, 3330665, 3996798, 6661330, 9991995, 19983990]

約数ペア:

[(1, 19983990), (2, 9991995), (3, 6661330), (5, 3996798), (6, 3330665), (10, 1998399), (13, 1537230), (15, 1332266), (26, 768615), (30, 666133), (39, 512410), (65, 307446), (78, 256205), (130, 153723), (195, 102482), (390, 51241)]