39996980

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{389}}^1$

素因数の和:548

約数の個数: 48

約数和(自身を含む): 86682960

約数和(自身を除く): 46685980

約数列:

[1, 2, 4, 5, 10, 20, 53, 97, 106, 194, 212, 265, 388, 389, 485, 530, 778, 970, 1060, 1556, 1940, 1945, 3890, 5141, 7780, 10282, 20564, 20617, 25705, 37733, 41234, 51410, 75466, 82468, 102820, 103085, 150932, 188665, 206170, 377330, 412340, 754660, 1999849, 3999698, 7999396, 9999245, 19998490, 39996980]

約数ペア:

[(1, 39996980), (2, 19998490), (4, 9999245), (5, 7999396), (10, 3999698), (20, 1999849), (53, 754660), (97, 412340), (106, 377330), (194, 206170), (212, 188665), (265, 150932), (388, 103085), (389, 102820), (485, 82468), (530, 75466), (778, 51410), (970, 41234), (1060, 37733), (1556, 25705), (1940, 20617), (1945, 20564), (3890, 10282), (5141, 7780)]