19962980

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{509}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 43953840

約数和(自身を除く): 23990860

約数列:

[1, 2, 4, 5, 10, 20, 37, 53, 74, 106, 148, 185, 212, 265, 370, 509, 530, 740, 1018, 1060, 1961, 2036, 2545, 3922, 5090, 7844, 9805, 10180, 18833, 19610, 26977, 37666, 39220, 53954, 75332, 94165, 107908, 134885, 188330, 269770, 376660, 539540, 998149, 1996298, 3992596, 4990745, 9981490, 19962980]

約数ペア:

[(1, 19962980), (2, 9981490), (4, 4990745), (5, 3992596), (10, 1996298), (20, 998149), (37, 539540), (53, 376660), (74, 269770), (106, 188330), (148, 134885), (185, 107908), (212, 94165), (265, 75332), (370, 53954), (509, 39220), (530, 37666), (740, 26977), (1018, 19610), (1060, 18833), (1961, 10180), (2036, 9805), (2545, 7844), (3922, 5090)]