15981800

素因数分解:

$2^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{1949}}^1$

素因数の和:2006

約数の個数: 48

約数和(自身を含む): 38083500

約数和(自身を除く): 22101700

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 164, 200, 205, 328, 410, 820, 1025, 1640, 1949, 2050, 3898, 4100, 7796, 8200, 9745, 15592, 19490, 38980, 48725, 77960, 79909, 97450, 159818, 194900, 319636, 389800, 399545, 639272, 799090, 1598180, 1997725, 3196360, 3995450, 7990900, 15981800]

約数ペア:

[(1, 15981800), (2, 7990900), (4, 3995450), (5, 3196360), (8, 1997725), (10, 1598180), (20, 799090), (25, 639272), (40, 399545), (41, 389800), (50, 319636), (82, 194900), (100, 159818), (164, 97450), (200, 79909), (205, 77960), (328, 48725), (410, 38980), (820, 19490), (1025, 15592), (1640, 9745), (1949, 8200), (2050, 7796), (3898, 4100)]