18939872

素因数分解:

$2^5\times 7^2\times {\mathrm{47}}^1\times {\mathrm{257}}^1$

素因数の和:328

約数の個数: 72

約数和(自身を含む): 44470944

約数和(自身を除く): 25531072

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 47, 49, 56, 94, 98, 112, 188, 196, 224, 257, 329, 376, 392, 514, 658, 752, 784, 1028, 1316, 1504, 1568, 1799, 2056, 2303, 2632, 3598, 4112, 4606, 5264, 7196, 8224, 9212, 10528, 12079, 12593, 14392, 18424, 24158, 25186, 28784, 36848, 48316, 50372, 57568, 73696, 84553, 96632, 100744, 169106, 193264, 201488, 338212, 386528, 402976, 591871, 676424, 1183742, 1352848, 2367484, 2705696, 4734968, 9469936, 18939872]

約数ペア:

[(1, 18939872), (2, 9469936), (4, 4734968), (7, 2705696), (8, 2367484), (14, 1352848), (16, 1183742), (28, 676424), (32, 591871), (47, 402976), (49, 386528), (56, 338212), (94, 201488), (98, 193264), (112, 169106), (188, 100744), (196, 96632), (224, 84553), (257, 73696), (329, 57568), (376, 50372), (392, 48316), (514, 36848), (658, 28784), (752, 25186), (784, 24158), (1028, 18424), (1316, 14392), (1504, 12593), (1568, 12079), (1799, 10528), (2056, 9212), (2303, 8224), (2632, 7196), (3598, 5264), (4112, 4606)]