19881136

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:170

約数の個数: 80

約数和(自身を含む): 44782848

約数和(自身を除く): 24901712

約数列:

[1, 2, 4, 8, 11, 16, 22, 37, 43, 44, 71, 74, 86, 88, 142, 148, 172, 176, 284, 296, 344, 407, 473, 568, 592, 688, 781, 814, 946, 1136, 1562, 1591, 1628, 1892, 2627, 3053, 3124, 3182, 3256, 3784, 5254, 6106, 6248, 6364, 6512, 7568, 10508, 12212, 12496, 12728, 17501, 21016, 24424, 25456, 28897, 33583, 35002, 42032, 48848, 57794, 67166, 70004, 112961, 115588, 134332, 140008, 225922, 231176, 268664, 280016, 451844, 462352, 537328, 903688, 1242571, 1807376, 2485142, 4970284, 9940568, 19881136]

約数ペア:

[(1, 19881136), (2, 9940568), (4, 4970284), (8, 2485142), (11, 1807376), (16, 1242571), (22, 903688), (37, 537328), (43, 462352), (44, 451844), (71, 280016), (74, 268664), (86, 231176), (88, 225922), (142, 140008), (148, 134332), (172, 115588), (176, 112961), (284, 70004), (296, 67166), (344, 57794), (407, 48848), (473, 42032), (568, 35002), (592, 33583), (688, 28897), (781, 25456), (814, 24424), (946, 21016), (1136, 17501), (1562, 12728), (1591, 12496), (1628, 12212), (1892, 10508), (2627, 7568), (3053, 6512), (3124, 6364), (3182, 6248), (3256, 6106), (3784, 5254)]