19901492

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{479}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 40642560

約数和(自身を除く): 20741068

約数列:

[1, 2, 4, 13, 17, 26, 34, 47, 52, 68, 94, 188, 221, 442, 479, 611, 799, 884, 958, 1222, 1598, 1916, 2444, 3196, 6227, 8143, 10387, 12454, 16286, 20774, 22513, 24908, 32572, 41548, 45026, 90052, 105859, 211718, 292669, 382721, 423436, 585338, 765442, 1170676, 1530884, 4975373, 9950746, 19901492]

約数ペア:

[(1, 19901492), (2, 9950746), (4, 4975373), (13, 1530884), (17, 1170676), (26, 765442), (34, 585338), (47, 423436), (52, 382721), (68, 292669), (94, 211718), (188, 105859), (221, 90052), (442, 45026), (479, 41548), (611, 32572), (799, 24908), (884, 22513), (958, 20774), (1222, 16286), (1598, 12454), (1916, 10387), (2444, 8143), (3196, 6227)]