19808380

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{743}}^1$

素因数の和:826

約数の個数: 48

約数和(自身を含む): 43997184

約数和(自身を除く): 24188804

約数列:

[1, 2, 4, 5, 10, 20, 31, 43, 62, 86, 124, 155, 172, 215, 310, 430, 620, 743, 860, 1333, 1486, 2666, 2972, 3715, 5332, 6665, 7430, 13330, 14860, 23033, 26660, 31949, 46066, 63898, 92132, 115165, 127796, 159745, 230330, 319490, 460660, 638980, 990419, 1980838, 3961676, 4952095, 9904190, 19808380]

約数ペア:

[(1, 19808380), (2, 9904190), (4, 4952095), (5, 3961676), (10, 1980838), (20, 990419), (31, 638980), (43, 460660), (62, 319490), (86, 230330), (124, 159745), (155, 127796), (172, 115165), (215, 92132), (310, 63898), (430, 46066), (620, 31949), (743, 26660), (860, 23033), (1333, 14860), (1486, 13330), (2666, 7430), (2972, 6665), (3715, 5332)]