19976495

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:176

約数の個数: 48

約数和(自身を含む): 31026240

約数和(自身を除く): 11049745

約数列:

[1, 5, 7, 11, 35, 53, 55, 77, 89, 121, 265, 371, 385, 445, 583, 605, 623, 847, 979, 1855, 2915, 3115, 4081, 4235, 4717, 4895, 6413, 6853, 10769, 20405, 23585, 32065, 33019, 34265, 44891, 51887, 53845, 75383, 165095, 224455, 259435, 363209, 376915, 570757, 1816045, 2853785, 3995299, 19976495]

約数ペア:

[(1, 19976495), (5, 3995299), (7, 2853785), (11, 1816045), (35, 570757), (53, 376915), (55, 363209), (77, 259435), (89, 224455), (121, 165095), (265, 75383), (371, 53845), (385, 51887), (445, 44891), (583, 34265), (605, 33019), (623, 32065), (847, 23585), (979, 20405), (1855, 10769), (2915, 6853), (3115, 6413), (4081, 4895), (4235, 4717)]