19918647

素因数分解:

$3^2\times 7^2\times {\mathrm{31}}^2\times {\mathrm{47}}^1$

素因数の和:129

約数の個数: 54

約数和(自身を含む): 35319024

約数和(自身を除く): 15400377

約数列:

[1, 3, 7, 9, 21, 31, 47, 49, 63, 93, 141, 147, 217, 279, 329, 423, 441, 651, 961, 987, 1457, 1519, 1953, 2303, 2883, 2961, 4371, 4557, 6727, 6909, 8649, 10199, 13113, 13671, 20181, 20727, 30597, 45167, 47089, 60543, 71393, 91791, 135501, 141267, 214179, 316169, 406503, 423801, 642537, 948507, 2213183, 2845521, 6639549, 19918647]

約数ペア:

[(1, 19918647), (3, 6639549), (7, 2845521), (9, 2213183), (21, 948507), (31, 642537), (47, 423801), (49, 406503), (63, 316169), (93, 214179), (141, 141267), (147, 135501), (217, 91791), (279, 71393), (329, 60543), (423, 47089), (441, 45167), (651, 30597), (961, 20727), (987, 20181), (1457, 13671), (1519, 13113), (1953, 10199), (2303, 8649), (2883, 6909), (2961, 6727), (4371, 4557)]