19990660

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1697}}^1$

素因数の和:1756

約数の個数: 48

約数和(自身を含む): 45642240

約数和(自身を除く): 25651580

約数列:

[1, 2, 4, 5, 10, 19, 20, 31, 38, 62, 76, 95, 124, 155, 190, 310, 380, 589, 620, 1178, 1697, 2356, 2945, 3394, 5890, 6788, 8485, 11780, 16970, 32243, 33940, 52607, 64486, 105214, 128972, 161215, 210428, 263035, 322430, 526070, 644860, 999533, 1052140, 1999066, 3998132, 4997665, 9995330, 19990660]

約数ペア:

[(1, 19990660), (2, 9995330), (4, 4997665), (5, 3998132), (10, 1999066), (19, 1052140), (20, 999533), (31, 644860), (38, 526070), (62, 322430), (76, 263035), (95, 210428), (124, 161215), (155, 128972), (190, 105214), (310, 64486), (380, 52607), (589, 33940), (620, 32243), (1178, 16970), (1697, 11780), (2356, 8485), (2945, 6788), (3394, 5890)]