19947080

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{97}}^2$

素因数の和:258

約数の個数: 48

約数和(自身を含む): 46204020

約数和(自身を除く): 26256940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 97, 106, 194, 212, 265, 388, 424, 485, 530, 776, 970, 1060, 1940, 2120, 3880, 5141, 9409, 10282, 18818, 20564, 25705, 37636, 41128, 47045, 51410, 75272, 94090, 102820, 188180, 205640, 376360, 498677, 997354, 1994708, 2493385, 3989416, 4986770, 9973540, 19947080]

約数ペア:

[(1, 19947080), (2, 9973540), (4, 4986770), (5, 3989416), (8, 2493385), (10, 1994708), (20, 997354), (40, 498677), (53, 376360), (97, 205640), (106, 188180), (194, 102820), (212, 94090), (265, 75272), (388, 51410), (424, 47045), (485, 41128), (530, 37636), (776, 25705), (970, 20564), (1060, 18818), (1940, 10282), (2120, 9409), (3880, 5141)]