19681900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{907}}^1$

素因数の和:959

約数の個数: 72

約数和(自身を含む): 50441216

約数和(自身を除く): 30759316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 31, 35, 50, 62, 70, 100, 124, 140, 155, 175, 217, 310, 350, 434, 620, 700, 775, 868, 907, 1085, 1550, 1814, 2170, 3100, 3628, 4340, 4535, 5425, 6349, 9070, 10850, 12698, 18140, 21700, 22675, 25396, 28117, 31745, 45350, 56234, 63490, 90700, 112468, 126980, 140585, 158725, 196819, 281170, 317450, 393638, 562340, 634900, 702925, 787276, 984095, 1405850, 1968190, 2811700, 3936380, 4920475, 9840950, 19681900]

約数ペア:

[(1, 19681900), (2, 9840950), (4, 4920475), (5, 3936380), (7, 2811700), (10, 1968190), (14, 1405850), (20, 984095), (25, 787276), (28, 702925), (31, 634900), (35, 562340), (50, 393638), (62, 317450), (70, 281170), (100, 196819), (124, 158725), (140, 140585), (155, 126980), (175, 112468), (217, 90700), (310, 63490), (350, 56234), (434, 45350), (620, 31745), (700, 28117), (775, 25396), (868, 22675), (907, 21700), (1085, 18140), (1550, 12698), (1814, 10850), (2170, 9070), (3100, 6349), (3628, 5425), (4340, 4535)]