19817018

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1\times {\mathrm{197}}^1$

素因数の和:338

約数の個数: 32

約数和(自身を含む): 33230736

約数和(自身を除く): 13413718

約数列:

[1, 2, 13, 26, 53, 73, 106, 146, 197, 394, 689, 949, 1378, 1898, 2561, 3869, 5122, 7738, 10441, 14381, 20882, 28762, 50297, 100594, 135733, 186953, 271466, 373906, 762193, 1524386, 9908509, 19817018]

約数ペア:

[(1, 19817018), (2, 9908509), (13, 1524386), (26, 762193), (53, 373906), (73, 271466), (106, 186953), (146, 135733), (197, 100594), (394, 50297), (689, 28762), (949, 20882), (1378, 14381), (1898, 10441), (2561, 7738), (3869, 5122)]