389680880

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{256369}}^1$

素因数の和:256401

約数の個数: 40

約数和(自身を含む): 953696400

約数和(自身を除く): 564015520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 256369, 512738, 1025476, 1281845, 2050952, 2563690, 4101904, 4871011, 5127380, 9742022, 10254760, 19484044, 20509520, 24355055, 38968088, 48710110, 77936176, 97420220, 194840440, 389680880]

約数ペア:

[(1, 389680880), (2, 194840440), (4, 97420220), (5, 77936176), (8, 48710110), (10, 38968088), (16, 24355055), (19, 20509520), (20, 19484044), (38, 10254760), (40, 9742022), (76, 5127380), (80, 4871011), (95, 4101904), (152, 2563690), (190, 2050952), (304, 1281845), (380, 1025476), (760, 512738), (1520, 256369)]