19728080

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{12979}}^1$

素因数の和:13011

約数の個数: 40

約数和(自身を含む): 48285600

約数和(自身を除く): 28557520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 12979, 25958, 51916, 64895, 103832, 129790, 207664, 246601, 259580, 493202, 519160, 986404, 1038320, 1233005, 1972808, 2466010, 3945616, 4932020, 9864040, 19728080]

約数ペア:

[(1, 19728080), (2, 9864040), (4, 4932020), (5, 3945616), (8, 2466010), (10, 1972808), (16, 1233005), (19, 1038320), (20, 986404), (38, 519160), (40, 493202), (76, 259580), (80, 246601), (95, 207664), (152, 129790), (190, 103832), (304, 64895), (380, 51916), (760, 25958), (1520, 12979)]